PHP get_resource_type() Function

Return the resource type:

<?php
$file = fopen("test.txt","r");
echo get_resource_type($file);
?>

Definition and Usage

The get_resource_type() function returns the type of a resource.

get_resource_type( resource);

Parameter	Description
resource	Required. Specifies the resource to check

Return Value:	The type as a string on success, if type is not identified it returns "unknown", if resource is not a resource it returns NULL and generates an error
Return Type:	String
PHP Version:	4.0.2+
PHP Changelog:	PHP 5.3: If resource is not a resource it returns NULL. Earlier, the returned value was FALSE