diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..57872d0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/vendor/
diff --git a/README.md b/README.md
index 86897cd..2206a1b 100644
--- a/README.md
+++ b/README.md
@@ -14,9 +14,31 @@ than simply calling `strpos` many times, and it's much faster than calling
 I originally wrote this to use with [F5Bot](https://f5bot.com), since it's
 searching for the same set of a few thousand keywords over and over again.
 
+# Install via Composer
+
+Add the following to your project's `composer.json`:
+
+```json
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/codeplea/ahocorasickphp"
+        }
+    ],
+    "require": {
+        "codeplea/ahocorasickphp": "dev-master"
+    }
+```
+
+Then, install the package itself:
+
+```bash
+$ composer update
+```
+
 # Usage
 
-It's designed to be really easy to use. You create the `ahocorasick` object,
+It's designed to be really easy to use. You create the `Search` object,
 add your keywords, call `finalize()` to finish setup, and then search your
 text. It'll return an array of the keywords found and their position in the
 search text.
@@ -24,22 +46,22 @@ search text.
 Create, add keywords, and `finalize()`:
 
 ```php
-require('ahocorasick.php');
+use codeplea\AhoCorasick\Search;
 
-$ac = new ahocorasick();
+$ac = new Search();
 
-$ac->add_needle('art');
-$ac->add_needle('cart');
-$ac->add_needle('ted');
+$ac->addNeedle('art');
+$ac->addNeedle('cart');
+$ac->addNeedle('ted');
 
 $ac->finalize();
 
 ```
 
-Call `search()` to preform the actual search. It'll return an array of matches.
+Call `execute()` to preform the actual search. It'll return an array of matches.
 
 ```php
-$found = $ac->search('a carted mart lot one blue ted');
+$found = $ac->execute('a carted mart lot one blue ted');
 print_r($found);
 ```
 
@@ -97,10 +119,17 @@ time: 0.054709911346436
 
 ```
 
-Note: the regex solutions are actually slightly broken. They won't work if you
+**Note:** the regex solutions are actually slightly broken. They won't work if you
 have a keyword that is a prefix or suffix of another. But hey, who really uses
 regex when it's not slightly broken?
 
-Also keep in mind that building the search tree (the `add_needle()` and
+Also keep in mind that building the search tree (the `addNeedle()` and
 `finalize()` calls) takes time. So you'll get the best speed-up if you're
-reusing the same keywords and calling `search()` many times.
+reusing the same keywords and calling `execute()` many times.
+
+# Running tests
+
+```$php
+$ composer install
+$ ./vendor/bin/phpunit
+```
\ No newline at end of file
diff --git a/ahocorasick.php b/ahocorasick.php
deleted file mode 100644
index cd3747c..0000000
--- a/ahocorasick.php
+++ /dev/null
@@ -1,117 +0,0 @@
-<?php
-
-/*
- * ahocorasick - fast string searching in php
- *
- * Copyright (c) 2017-2018 Lewis Van Winkle
- *
- * http://CodePlea.com
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event will the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- *
- * 1. The origin of this software must not be misrepresented; you must not
- *    claim that you wrote the original software. If you use this software
- *    in a product, an acknowledgement in the product documentation would be
- *    appreciated but is not required.
- * 2. Altered source versions must be plainly marked as such, and must not be
- *    misrepresented as being the original software.
- * 3. This notice may not be removed or altered from any source distribution.
- *
- */
-
-
-
-class ahocorasick {
-
-  private $nodes = array(array());
-
-  private $final = 0;
-
-
-  public function add_needle($needle) {
-    if ($this->final) throw new Exception("Cannot add word to finalized ahocorasick.");
-
-    $nodes = &$this->nodes;
-    $n = 0;
-
-    for ($i = 0; $i < strlen($needle); ++$i) {
-      $c = $needle[$i];
-
-      if (!isset($nodes[$n][$c])) {
-        $nodes[$n][$c] = count($nodes);
-        $nodes[] = array();
-      }
-      $n = $nodes[$n][$c];
-    }
-
-    $nodes[$n][0][] = $needle;
-  }
-
-
-  public function finalize() {
-    $nodes = &$this->nodes;
-    $queue = array();
-
-    foreach($nodes[0] as $j => $_) {
-      $nodes[$nodes[0][$j]][1] = 0;
-      $queue[] = $nodes[0][$j];
-    }
-
-    while (count($queue)) {
-      $r = $queue[0];
-      $queue = array_slice($queue, 1);
-
-      foreach($nodes[$r] as $j => $_) {
-        if ($j === 0 || $j === 1) continue;
-        $v = $nodes[$r][1];
-        $u = $nodes[$r][$j];
-        while ($v > 0 && !isset($nodes[$v][$j])) $v = $nodes[$v][1];
-        $nodes[$u][1] = isset($nodes[$v][$j]) ? $nodes[$v][$j] : $v;
-        if (isset($nodes[$nodes[$u][1]][0])) {
-          if (!isset($nodes[$u][0])) $nodes[$u][0] = array();
-          $nodes[$u][0] = array_merge($nodes[$u][0], $nodes[$nodes[$u][1]][0]);
-        }
-        $queue[] = $u;
-      }
-    }
-
-    $this->final = 1;
-  }
-
-
-  public function search($haystack) {
-    if (!$this->final) throw new Exception("Must call finalize() before search.");
-
-    $nodes = &$this->nodes;
-    $found = array();
-    $n = 0;
-
-    for ($i = 0; $i < strlen($haystack); ++$i) {
-      $c = $haystack[$i];
-
-      while(!in_array($c, array_keys($nodes[$n]), true) && $n) {
-        $n = $nodes[$n][1];
-        if ($n === null) die();
-      }
-
-      if (isset($nodes[$n][$c]))
-        $n = $nodes[$n][$c];
-
-      if (isset($nodes[$n][0])) {
-        $z = $nodes[$n][0];
-        foreach($z as $w) {
-          $found[] = array($w, $i - strlen($w) + 1);
-        }
-      }
-    }
-
-    return $found;
-  }
-
-};
diff --git a/benchmark.php b/benchmark.php
index ef08f6f..63dc94e 100644
--- a/benchmark.php
+++ b/benchmark.php
@@ -1,120 +1,11 @@
 <?php
+use codeplea\AhoCorasick\Benchmark;
 
-/* This program will benchmark searching for 1,000 keywords in a 5,000 word text all at once. */
-/* It compares our ahocorasick method with regex and strpos. */
-
-
-require('ahocorasick.php');
-require('benchmark_setup.php'); /* keywords and text */
-
-$loops = 10;
-
-print("Loaded " . count($needles) . " keywords to search on a text of " .
-  strlen($haystack) . " characters.\n");
-
-print("\nSearching with strpos...\n");
-
-$st = microtime(1);
-for ($loop = 0; $loop < $loops; ++$loop) {
-  $found = array();
-  foreach($needles as $n) {
-    $k = 0;
-    while(($k = strpos($haystack, $n, $k)) !== FALSE) {
-      $found[] = array($n, $k);
-      ++$k;
-    }
-  }
-}
-$et = microtime(1);
-print("time: " . ($et - $st) . "\n");
-$found_strpos = $found;
-
-
-
-
-
-
-print("\nSearching with preg_match...\n");
-//Note, this actually sucks and misses cases where one needle is a prefix or
-//suffix of another.
-$regex = '/' . implode('|', $needles) . '/';
-
-$st = microtime(1);
-for ($loop = 0; $loop < $loops; ++$loop) {
-  $found = array();
-  $k = 0;
-  while(preg_match($regex, $haystack, $m, PREG_OFFSET_CAPTURE, $k)) {
-    $found[] = $m[0];
-    $k = $m[0][1] + 1;
-  }
-}
-$et = microtime(1);
-print("time: " . ($et - $st) . "\n");
-//print_r($found);
-
-
-
-
-
-
-print("\nSearching with preg_match_all...\n");
-//Note, this actually sucks and misses cases where one needle is a prefix or
-//suffix of another.
-$regex = '/' . implode('|', $needles) . '/';
-
-$st = microtime(1);
-for ($loop = 0; $loop < $loops; ++$loop) {
-  $found = array();
-  $k = 0;
-  preg_match_all($regex, $haystack, $found, PREG_OFFSET_CAPTURE);
-  $found = $found[0];
-}
-$et = microtime(1);
-print("time: " . ($et - $st) . "\n");
-
-
-
-
-
-print("\nSearching with aho corasick...\n");
-$ac = new ahocorasick();
-foreach ($needles as $n) $ac->add_needle($n);
-$ac->finalize();
-
-$st = microtime(1);
-for ($loop = 0; $loop < $loops; ++$loop) {
-  $found = array();
-  $found = $ac->search($haystack);
-}
-$et = microtime(1);
-print("time: " . ($et - $st) . "\n");
-
-
-
-
-
-
-//Check that the answers match.
-//First sort the arrays.
-$comp = function($a, $b) {return ($a[1] === $b[1]) ? ($a[0] > $b[0]) : ($a[1] > $b[1]);};
-usort($found, $comp);
-usort($found_strpos, $comp);
-
-if ($found_strpos !== $found) {
-  print("ERROR - Aho Corasick got the wrong result.\n");
-
-  print("strpos size: " . count($found_strpos) . "\n");
-  print("aho corasick size: " . count($found) . "\n");
-
-  for ($i = 0; $i < count($found); ++$i) {
-    if ($found_strpos[$i] !== $found[$i]) {
-      print("Mismatch $i\n");
-      print_r($found_strpos[$i]);
-      print_r($found[$i]);
-    }
-  }
-}
-
-
+require 'vendor/autoload.php';
 
+/* keywords and text */
+require 'benchmark_setup.php';
 
+// Benchmark searching for 1,000 keywords in a 5,000 word text all at once.
+$benchmark = new Benchmark();
+$benchmark->run($needles, $haystack);
diff --git a/benchmark_setup.php b/benchmark_setup.php
index 83aa0ba..2cddf5a 100644
--- a/benchmark_setup.php
+++ b/benchmark_setup.php
@@ -1,6 +1,6 @@
 <?php
 
-$needles = array('abandonment', 'abashed', 'abashments', 'abduction',
+$needles = ['abandonment', 'abashed', 'abashments', 'abduction',
 'aberrant', 'abiding', 'abidingly', 'abjures', 'ablution', 'abolishes',
 'abominably', 'aborted', 'abrasion', 'abridgment', 'abscesses', 'absconds',
 'absences', 'absinthe', 'absolves', 'absorbingly', 'abundant', 'abused',
@@ -532,7 +532,7 @@
 'remonstrates', 'remorse', 'removes', 'remunerated', 'rendering',
 'renditions', 'reneged', 'renominate', 'renovators', 'reorders',
 'repatriates', 'repave', 'repaying', 'repeatedly', 'repertoires', 'replied',
-'reprehend', 'reprieves', 'reprimanded');
+'reprehend', 'reprieves', 'reprimanded'];
 
 $haystack = 'unscathed grampus antinuclear avenged waste oversee doggies spumes
 senators balk gooseberries grilles respelled ceramists outlaid maladroitly
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..01bbfb1
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,25 @@
+{
+    "name": "codeplea/ahocorasickphp",
+    "description": "Aho-Corasick multi-keyword string searching library in PHP.",
+    "authors": [
+        {
+            "name": "Lewis Van Winkle"
+        }
+    ],
+    "type": "library",
+    "license": "zlib",
+    "config": {
+        "sort-packages": true
+    },
+    "require": {
+        "php": ">=7.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^7.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "codeplea\\AhoCorasick\\": "src"
+        }
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..b2e0985
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1428 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "0288e7d5499423c5e2dc038a0eeabda1",
+    "packages": [],
+    "packages-dev": [
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "athletic/athletic": "~0.1.8",
+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpunit/phpunit": "^6.2.3",
+                "squizlabs/php_codesniffer": "^3.0.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://github.com/doctrine/instantiator",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2017-07-22T11:58:36+00:00"
+        },
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.8.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8",
+                "reference": "3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "replace": {
+                "myclabs/deep-copy": "self.version"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.0",
+                "doctrine/common": "^2.6",
+                "phpunit/phpunit": "^7.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                },
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "time": "2018-06-11T23:09:50+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-phar": "*",
+                "phar-io/version": "^2.0",
+                "php": "^5.6 || ^7.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "time": "2018-07-08T19:23:20+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.6 || ^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "time": "2018-07-08T19:19:57+00:00"
+        },
+        {
+            "name": "phpdocumentor/reflection-common",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
+            ],
+            "time": "2017-09-11T18:02:19+00:00"
+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "4.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
+                "reference": "94fd0001232e47129dd3504189fa1c7225010d08"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/94fd0001232e47129dd3504189fa1c7225010d08",
+                "reference": "94fd0001232e47129dd3504189fa1c7225010d08",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "phpdocumentor/reflection-common": "^1.0.0",
+                "phpdocumentor/type-resolver": "^0.4.0",
+                "webmozart/assert": "^1.0"
+            },
+            "require-dev": {
+                "doctrine/instantiator": "~1.0.5",
+                "mockery/mockery": "^1.0",
+                "phpunit/phpunit": "^6.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
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+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides functionality to handle HHVM/PHP environments",
+            "homepage": "http://www.github.com/sebastianbergmann/environment",
+            "keywords": [
+                "Xdebug",
+                "environment",
+                "hhvm"
+            ],
+            "time": "2017-07-01T08:51:00+00:00"
+        },
+        {
+            "name": "sebastian/exporter",
+            "version": "3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/exporter.git",
+                "reference": "234199f4528de6d12aaa58b612e98f7d36adb937"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/234199f4528de6d12aaa58b612e98f7d36adb937",
+                "reference": "234199f4528de6d12aaa58b612e98f7d36adb937",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "ext-mbstring": "*",
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.1.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Volker Dusch",
+                    "email": "github@wallbash.com"
+                },
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@2bepublished.at"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides the functionality to export PHP variables for visualization",
+            "homepage": "http://www.github.com/sebastianbergmann/exporter",
+            "keywords": [
+                "export",
+                "exporter"
+            ],
+            "time": "2017-04-03T13:19:02+00:00"
+        },
+        {
+            "name": "sebastian/global-state",
+            "version": "2.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/global-state.git",
+                "reference": "e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4",
+                "reference": "e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "suggest": {
+                "ext-uopz": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Snapshotting of global state",
+            "homepage": "http://www.github.com/sebastianbergmann/global-state",
+            "keywords": [
+                "global state"
+            ],
+            "time": "2017-04-27T15:39:26+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "time": "2017-08-03T12:35:26+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29T09:07:27+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2017-03-03T06:23:57+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2015-07-28T20:34:47+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2018-01-29T19:49:41+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=7.0"
+    },
+    "platform-dev": []
+}
diff --git a/example.php b/example.php
index 744486e..37d0759 100644
--- a/example.php
+++ b/example.php
@@ -1,27 +1,28 @@
 <?php
+use codeplea\AhoCorasick\Search;
 
 /* Just an example of how to use the library. */
 
-require('ahocorasick.php');
+require 'vendor/autoload.php';
 
 
 
 /* Say we have the following text:
  * "a carted mart lot one blue ted"
- * and we want to find each occurance in
+ * and we want to find each occurrence in
  * it of the following list of keywords:
  * 'art', 'cart', 'ted'
  */
 
 
 /* Create the search engine. */
-$ac = new ahocorasick();
+$ac = new Search();
 
 
 /* Add each keyword we'll search for. */
-$ac->add_needle('art');
-$ac->add_needle('cart');
-$ac->add_needle('ted');
+$ac->addNeedle('art');
+$ac->addNeedle('cart');
+$ac->addNeedle('ted');
 
 
 /* Now call finalize. This lets the engine
@@ -34,11 +35,9 @@
 /* And finally do the search. It should be fast. */
 
 /*                    012345678901234567890123456789 */
-$found = $ac->search('a carted mart lot one blue ted');
+$found = $ac->execute('a carted mart lot one blue ted');
 
 
 /* It'll return an array with each keyword found and its
  * position in the search text. */
 print_r($found);
-
-
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..5066e14
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,7 @@
+<phpunit bootstrap="vendor/autoload.php">
+    <testsuites>
+        <testsuite name="Aho Corasick PHP">
+            <directory>test</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
\ No newline at end of file
diff --git a/src/Benchmark.php b/src/Benchmark.php
new file mode 100644
index 0000000..838520f
--- /dev/null
+++ b/src/Benchmark.php
@@ -0,0 +1,147 @@
+<?php
+namespace codeplea\AhoCorasick;
+
+use codeplea\AhoCorasick\Search;
+
+class Benchmark
+{
+    protected $foundStrpos = [];
+
+    /**
+     * @param array $needles
+     * @param string $haystack
+     * @param int $loops
+     */
+    protected function benchmarkStrpos(array $needles, string $haystack, int $loops)
+    {
+        print "\nSearching with strpos...\n";
+
+        $st = microtime(1);
+        for ($loop = 0; $loop < $loops; ++$loop) {
+            $found = [];
+            foreach ($needles as $n) {
+                $k = 0;
+                while (($k = strpos($haystack, $n, $k)) !== false) {
+                    $found[] = [$n, $k];
+                    ++$k;
+                }
+            }
+        }
+
+        $et = microtime(1);
+        print 'time: ' . ($et - $st) . "\n";
+        $this->foundStrpos = $found;
+    }
+
+    /**
+     * @param array $needles
+     * @param string $haystack
+     * @param int $loops
+     */
+    protected function benchmarkPregMatch(array $needles, string $haystack, int $loops)
+    {
+        print "\nSearching with preg_match...\n";
+
+        // Note, this actually sucks and misses cases where one needle is a prefix or
+        // suffix of another.
+        $regex = '/' . implode('|', $needles) . '/';
+
+        $st = microtime(1);
+        for ($loop = 0; $loop < $loops; ++$loop) {
+            $k = 0;
+            while (preg_match($regex, $haystack, $m, PREG_OFFSET_CAPTURE, $k)) {
+                $k = $m[0][1] + 1;
+            }
+        }
+        $et = microtime(1);
+        print 'time: ' . ($et - $st) . "\n";
+    }
+
+    /**
+     * @param array $needles
+     * @param string $haystack
+     * @param int $loops
+     */
+    protected function benchmarkPregMatchAll(array $needles, string $haystack, int $loops)
+    {
+        print "\nSearching with preg_match_all...\n";
+
+        // Note, this actually sucks and misses cases where one needle is a prefix or
+        // suffix of another.
+        $regex = '/' . implode('|', $needles) . '/';
+
+        $st = microtime(1);
+        for ($loop = 0; $loop < $loops; ++$loop) {
+            preg_match_all($regex, $haystack, $found, PREG_OFFSET_CAPTURE);
+        }
+        $et = microtime(1);
+        print 'time: ' . ($et - $st) . "\n";
+    }
+
+    /**
+     * @param array $needles
+     * @param string $haystack
+     * @param int $loops
+     * @throws \Exception
+     */
+    protected function benchmarkAhoCorasick(array $needles, string $haystack, int $loops)
+    {
+        print "\nSearching with aho corasick...\n";
+
+        $ac = new Search();
+        foreach ($needles as $n) {
+            $ac->addNeedle($n);
+        }
+        $ac->finalize();
+
+        $st = microtime(1);
+        for ($loop = 0; $loop < $loops; ++$loop) {
+            $found = $ac->execute($haystack);
+        }
+        $et = microtime(1);
+        print 'time: ' . ($et - $st) . "\n";
+
+        // Check that the answers match.
+        // First sort the arrays.
+        $comp = function ($a, $b) {
+            return ($a[1] === $b[1]) ? ($a[0] > $b[0]) : ($a[1] > $b[1]);
+        };
+        usort($found, $comp);
+        usort($this->foundStrpos, $comp);
+
+        if ($this->foundStrpos !== $found) {
+            print "ERROR - Aho Corasick got the wrong result.\n";
+
+            print 'strpos size: ' . count($this->foundStrpos) . "\n";
+            print 'aho corasick size: ' . count($found) . "\n";
+
+            $numberFound = count($found);
+
+            for ($i = 0; $i < $numberFound; ++$i) {
+                if ($this->foundStrpos[$i] !== $found[$i]) {
+                    print "Mismatch $i\n";
+                    print_r($this->foundStrpos[$i]);
+                    print_r($found[$i]);
+                }
+            }
+        }
+    }
+
+    /**
+     * Compares the performance of Aho Corasick against strpos, preg_match, and preg_match_all
+     *
+     * @param array $needles
+     * @param string $haystack
+     * @param int $loops
+     * @throws \Exception
+     */
+    public function run(array $needles, string $haystack, int $loops = 10)
+    {
+        print 'Loaded ' . count($needles) . ' keywords to search on a text of ' . strlen($haystack) . " characters.\n";
+
+        $this->benchmarkStrpos($needles, $haystack, $loops);
+        $this->benchmarkPregMatch($needles, $haystack, $loops);
+        $this->benchmarkPregMatchAll($needles, $haystack, $loops);
+        $this->benchmarkAhoCorasick($needles, $haystack, $loops);
+    }
+}
diff --git a/src/Search.php b/src/Search.php
new file mode 100644
index 0000000..6bc6a82
--- /dev/null
+++ b/src/Search.php
@@ -0,0 +1,154 @@
+<?php
+namespace codeplea\AhoCorasick;
+
+use \Exception;
+
+/*
+ * ahocorasick - fast string searching in php
+ *
+ * Copyright (c) 2017-2018 Lewis Van Winkle
+ *
+ * http://CodePlea.com
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgement in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ */
+
+
+
+class Search
+{
+
+    private $nodes = [ [] ];
+
+    private $final = 0;
+
+    /**
+     * Add a keyword to search for.
+     *
+     * @param string $needle
+     * @throws Exception
+     */
+    public function addNeedle(string $needle)
+    {
+        if ($this->final) {
+            throw new Exception('Cannot add word to finalized ahocorasick.');
+        }
+
+        $nodes = &$this->nodes;
+        $n = 0;
+
+        $needleLength = strlen($needle);
+
+        for ($i = 0; $i < $needleLength; ++$i) {
+            $c = $needle[$i];
+
+            if (!isset($nodes[$n][$c])) {
+                $nodes[$n][$c] = count($nodes);
+                $nodes[] = [];
+            }
+            $n = $nodes[$n][$c];
+        }
+
+        $nodes[$n][0][] = $needle;
+    }
+
+    /**
+     * Create the structure needed to search text for the given keywords.
+     * Once you call this, you cannot add additional keywords via addNeedle().
+     */
+    public function finalize()
+    {
+        $nodes = &$this->nodes;
+        $queue = [];
+
+        foreach ($nodes[0] as $j => $_) {
+            $nodes[$nodes[0][$j]][1] = 0;
+            $queue[] = $nodes[0][$j];
+        }
+
+        while (count($queue)) {
+            $r = $queue[0];
+            $queue = array_slice($queue, 1);
+
+            foreach ($nodes[$r] as $j => $_) {
+                if ($j === 0 || $j === 1) {
+                    continue;
+                }
+                $v = $nodes[$r][1];
+                $u = $nodes[$r][$j];
+                while ($v > 0 && !isset($nodes[$v][$j])) {
+                    $v = $nodes[$v][1];
+                }
+                $nodes[$u][1] = $nodes[$v][$j] ?? $v;
+                if (isset($nodes[$nodes[$u][1]][0])) {
+                    if (!isset($nodes[$u][0])) {
+                        $nodes[$u][0] = [];
+                    }
+                    $nodes[$u][0] = array_merge($nodes[$u][0], $nodes[$nodes[$u][1]][0]);
+                }
+                $queue[] = $u;
+            }
+        }
+
+        $this->final = 1;
+    }
+
+    /**
+     * Search the text for the given keywords.
+     *
+     * @param string $haystack
+     * @return array
+     * @throws Exception
+     */
+    public function execute(string $haystack):array
+    {
+        if (!$this->final) {
+            throw new Exception('Must call finalize() before search.');
+        }
+
+        $nodes = &$this->nodes;
+        $found = [];
+        $n = 0;
+
+        $haystackLength = strlen($haystack);
+
+        for ($i = 0; $i < $haystackLength; ++$i) {
+            $c = $haystack[$i];
+
+            while (!array_key_exists($c, $nodes[$n]) && $n) {
+                $n = $nodes[$n][1];
+                if ($n === null) {
+                    die();
+                }
+            }
+
+            if (isset($nodes[$n][$c])) {
+                $n = $nodes[$n][$c];
+            }
+
+            if (isset($nodes[$n][0])) {
+                $z = $nodes[$n][0];
+                foreach ($z as $w) {
+                    $found[] = [$w, $i - strlen($w) + 1];
+                }
+            }
+        }
+
+        return $found;
+    }
+}
diff --git a/test/AhoCorasickTest.php b/test/AhoCorasickTest.php
new file mode 100644
index 0000000..838b6bf
--- /dev/null
+++ b/test/AhoCorasickTest.php
@@ -0,0 +1,63 @@
+<?php
+use PHPUnit\Framework\TestCase;
+use codeplea\AhoCorasick\Search;
+
+class AhoCorasickTest extends TestCase
+{
+    protected $search;
+
+    public function setUp()
+    {
+        $this->search = new Search();
+
+        parent::setUp();
+    }
+
+    public function testSearch()
+    {
+        $expectedResult = [
+            ['cart', 2],
+            ['art', 3],
+            ['ted', 5],
+            ['art', 10],
+            ['ted', 27],
+        ];
+
+        $this->search->addNeedle('art');
+        $this->search->addNeedle('cart');
+        $this->search->addNeedle('ted');
+        $this->search->finalize();
+
+        $found = $this->search->execute('a carted mart lot one blue ted');
+
+        $this->assertSame($expectedResult, $found);
+    }
+
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage Must call finalize() before search.
+     */
+    public function testCannotSearchUnlessFinalized()
+    {
+        $this->search->addNeedle('art');
+        $this->search->addNeedle('cart');
+        $this->search->addNeedle('ted');
+
+        $this->search->execute('a carted mart lot one blue ted');
+    }
+
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage Cannot add word to finalized ahocorasick.
+     */
+    public function testCannotAddNeedleAfterFinalize()
+    {
+        $this->search->addNeedle('art');
+        $this->search->addNeedle('cart');
+        $this->search->addNeedle('ted');
+
+        $this->search->finalize();
+
+        $this->search->addNeedle('mart');
+    }
+}