Coalesce Function For PHP?

Answer :

There is a new operator in php 5.3 which does this: ?:

// A echo 'A' ?: 'B';  // B echo '' ?: 'B';  // B echo false ?: 'B';  // B echo null ?: 'B'; 

Source: http://www.php.net/ChangeLog-5.php#5.3.0

PHP 7 introduced a real coalesce operator:

echo $_GET['doesNotExist'] ?? 'fallback'; // prints 'fallback' 

If the value before the ?? does not exists or is null the value after the ?? is taken.

The improvement over the mentioned ?: operator is, that the ?? also handles undefined variables without throwing an E_NOTICE.

First hit for "php coalesce" on google.

function coalesce() {   $args = func_get_args();   foreach ($args as $arg) {     if (!empty($arg)) {       return $arg;     }   }   return NULL; } 

http://drupial.com/content/php-coalesce