PHP get_resource_type() Function

The get_resource_type() function is an inbuilt function in PHP that is used for returning the type of resource.

Syntax:

get_resource_type(resource $resource)

Parameters: This function accepts one parameter that described below:

• $resource: This parameter specifies the evaluated resource handle name.

Return Values: The function will return the string representing its type if the given resource is a resource. If the function does not determine the type of resource It will return Unknown.

Example 1: In the following example, we will print the type of resource by using the get_resource_type() function.

PHP

<?php
    $file_text = fopen("text.txt","rb") ;
    echo get_resource_type($file_text) ;
?>

Output:

stream

Example 2: In the below example, will print the Unknown when you used the get_resource_type() function without passing any resource to the function.

PHP

<?php
    $file_text = fopen("text.txt","rb") ;
    echo get_resource_type($file_text)."\n" ;
    fclose($file_text);
    echo get_resource_type($file_text) ;
?>

Output:

stream
Unknown

Reference: https://www.php.net/manual/en/function.get-resource-type.php