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is_resource (PHP 4, PHP 5) is_resource --
Finds whether a variable is a resource
Описаниеbool is_resource ( mixed var )
Finds whether the given variable is a resource.
Список параметров
- var
The variable being evaluated.
Возвращаемые значения
Returns TRUE if var is a resource,
FALSE otherwise.
Примеры
Пример 1. is_resource() example
<?php
$db_link = @mysql_connect('localhost', 'mysql_user', 'mysql_pass');
if (!is_resource($db_link)) {
die('Can\'t connect : ' . mysql_error());
}
?>
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