Looking for an existing entry

Check if a contact record exists, by using the first and the last name as constraints. If there is a John Smith among your contacts the code below will print out only some fields (listed below). This is useful when you don't need all the information available.

// Look for John Smith in Contacts
// and print out only some fields
$johnSmith = $client->entities->findOne('Contacts', [
    'firstname'             => 'John',
    'lastname'              => 'Smith',
], [
    'id',
    'salutationtype',
    'firstname',
    'lastname',
    'email',
    'phone'
]);
if (false !== $johnSmith) {
    print_r($johnSmith);
} else {
    echo('John Smith\'s record doesn\'t exists!' . PHP_EOL);
}

// The output
Array
(
    [id] => 12x3
    [salutationtype] => Mr.
    [firstname] => John
    [lastname] => Smith
    [email] => [email protected]
    [phone] => +103030303
)