Variable handling Functions
PHP Manual

is_resource

Finds whether a variable is a resource

Description

bool is_resource(mixed $value)

Finds whether the given variable is a resource.

Parameters

value

The variable being evaluated.

Return Values

Returns true if value is a resource, false otherwise.

Examples

Example #1 is_resource example

<?php

$handle = fopen("php://stdout", "w");
if (is_resource($handle)) {
    echo '$handle is a resource';
}

?>

The above example will output:

$handle is a resource

Notes

Note:

is_resource is not a strict type-checking method: it will return false if value is a resource variable that has been closed.

See Also