Hello daxslab\taggedview!

README.md

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+TaggedView
+==========
+Extension to help setup the standard HTML meta tags besides the ones defined by Opengraph and TwitterCard to contribute to website SEO
+
+Installation
+------------
+
+The preferred way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+
+```
+php composer.phar require --prefer-dist daxslab/yii2-taggedview "*"
+```
+
+or add
+
+```
+"daxslab/yii2-taggedview": "*"
+```
+
+to the require section of your `composer.json` file.
+
+Configuration
+-------------
+
+Configure the View component into the main configuration file of your application:
+
+    'components' => [
+        ...
+        'view' => [
+            'class' => 'daxslab\taggedview\View',
+            //configure some default values that will be shared by all the pages of the website
+            //if they are not overwritten by the page itself
+            'image' => 'http://domain.com/images/default-image.jpg',
+        ],
+        ...
+    ]
+
+Usage
+-----
+
+Once the extension is configured, simply use it in your views by:
+
+    <?php 
+    $this->title = 'page title';
+    $this->description = 'page description';
+    $this->keywords = 'page keywords';
+    $this->image = 'http://domain.com/images/page-image.jpg'; 
+    ?>

View.php

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+<?php
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+namespace daxslab\taggedview;
+
+use Yii;
+use yii\web\View as BaseView;
+
+/**
+ * Description of SeoTags
+ *
+ * @author glpz
+ */
+class View extends BaseView
+{
+
+    // toogle tags to register
+    public $registerStandardTags = true;
+    public $registerOpenGraphTags = true;
+    public $registerTwitterCardTags = true;
+    // toogle translations
+    public $translate = ['title', 'site_name', 'description', 'author', 'keywords'];
+    //meta properties
+    public $author;
+    public $site_name;
+    public $url;
+    public $description;
+    public $type;
+    public $locale;
+    public $image;
+    public $robots;
+    public $keywords = [];
+    public $creator;
+    public $generator;
+    public $date;
+    public $data_type;
+    public $card;
+    public $site;
+    public $label1;
+    public $data1;
+    public $label2;
+    public $data2;
+
+    private $updated_time;
+
+    public function init()
+    {
+        if ($this->site_name == null) {
+            $this->site_name = Yii::$app->name;
+        }
+        if ($this->url == null) {
+            $this->url = Yii::$app->request->absoluteUrl;
+        }
+
+        $this->translateProperties();
+    }
+
+    protected function renderHeadHtml()
+    {
+        if ($this->locale == null) {
+            $this->locale = str_replace('-', '_', Yii::$app->language);
+        }
+
+        if ($this->registerStandardTags) {
+            $this->registerStandardMetaTags();
+        }
+
+        if ($this->registerOpenGraphTags) {
+            $this->registerOpenGraphMetaTags();
+        }
+
+        if ($this->registerTwitterCardTags) {
+            $this->registerTwitterCardMetaTags();
+        }
+
+        array_multisort($this->metaTags);
+        return parent::renderHeadHtml();
+    }
+
+    protected function registerStandardMetaTags()
+    {
+
+        foreach ($this->keywords as $keyword) {
+            $this->registerMetaTag(['name' => 'article:tag', 'content' => trim($keyword)]);
+        }
+
+        $this->keywords = empty($this->keywords) ? null : join(', ', $this->keywords);
+        foreach (['author', 'description', 'robots', 'keywords', 'generator'] as $property) {
+            if ($this->$property) {
+                $this->registerMetaTag(['name' => $property, 'content' => $this->$property]);
+            }
+        }
+
+        $this->registerLinkTag(['rel' => 'canonical', 'href' => $this->url]);
+
+    }
+
+    protected function registerOpenGraphMetaTags()
+    {
+
+        $this->updated_time = $this->date;
+
+        foreach (['title', 'url', 'site_name', 'type', 'description', 'locale', 'updated_time'] as $property) {
+            if ($this->$property) {
+                $this->registerMetaTag(['property' => "og:" . $property, 'content' => $this->$property]);
+            }
+
+        }
+
+        if ($this->image !== null) {
+            if (is_array($this->image)) {
+                foreach ($this->image as $key => $value) {
+                    $this->registerMetaTag(['property' => 'og:image', 'content' => $value], 'og:image' . $key);
+                }
+            } else {
+                $this->registerMetaTag(['property' => 'og:image', 'content' => $this->image], 'og:image');
+            }
+
+        }
+    }
+
+
+    protected function registerTwitterCardMetaTags()
+    {
+        foreach ([
+                     'card',
+                     'title',
+                     'url',
+                     'creator',
+                     'site',
+                     'type',
+                     'description',
+                     'label1',
+                     'data1',
+                     'label2',
+                     'data2'
+                 ] as $property) {
+            if ($this->$property) {
+                $this->registerMetaTag(['name' => "twitter:" . $property, 'content' => $this->$property]);
+            }
+        }
+
+        if ($this->image !== null) {
+            if (is_array($this->image)) {
+                $this->registerMetaTag(['name' => 'twitter:image', 'content' => $this->image[0]], 'twitter:image');
+            } else {
+                $this->registerMetaTag(['name' => 'twitter:image', 'content' => $this->image], 'twitter:image');
+            }
+        }
+    }
+
+    protected function translateProperties()
+    {
+        foreach ($this->translate as $property) {
+            if ($this->$property != null) {
+                if (is_array($this->$property)) {
+                    $the_array = $this->$property;
+                    foreach ($the_array as $i => $word) {
+                        $the_array[$i] = Yii::t('app', $word);
+                    }
+                    $this->$property = $the_array;
+                } else {
+                    $this->$property = Yii::t('app', $this->$property);
+                }
+            }
+        }
+    }
+
+}

composer.json

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+{
+    "name": "daxslab/yii2-taggedview",
+    "description": "Extension to help setup the standard HTML meta tags besides the ones defined by Opengraph and Twitter to contribute to website SEO",
+    "type": "yii2-extension",
+    "keywords": ["yii2","seo","html","metatags","facebook","twitter"],
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Gabriel A. López López",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {
+        "yiisoft/yii2": "*"
+    },
+    "autoload": {
+        "psr-4": {
+            "daxslab\\taggedview\\": ""
+        }
+    }
+}