Coalesce function for PHP?

php optimization null-coalescing-operator

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

// Aecho 'A' ?: 'B';// Becho '' ?: 'B';// Becho false ?: 'B';// Becho null ?: 'B';

php optimization null-coalescing-operator

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.

php optimization null-coalescing-operator

First hit for "php coalesce" on google.

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

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