get_resource_type

(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)

get_resource_type — Returns the resource type

Description

get_resource_type(resource $resource): string

This function gets the type of the given resource.

Parameters

resource

The evaluated resource handle.

Return Values

If the given resource is a resource, this function will return a string representing its type. If the type is not identified by this function, the return value will be the string Unknown.

This function will return null and generate an error if resource is not a resource.

Examples

Example #1 get_resource_type() example

<?php
$fp = fopen("foo", "w");
echo get_resource_type($fp) . "\n";

// As of PHP 8.0.0, the following does not work anymore. The curl_init function returns a CurlHandle object now.
$c = curl_init();
echo get_resource_type($c) . "\n";
?>

Output of the above example in PHP 7:

stream
curl

See Also