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(PHP 4, PHP 5)

is_resource --  Finds whether a variable is a resource

Description

bool is_resource ( mixed var )

Finds whether the given variable is a resource.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is a resource , FALSE otherwise.

Examples

Example 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());
}

?>

Related Function(s)

get_resource_type()