The get_resource_id() function is an inbuilt function in PHP that returns the integer id given resource. This function provides a safe way of generating integers for a resource.
Syntax:
get_resource_id($resource) ;
Parameters: This function accepts one parameter that are described below:
- $resource: Name of the resource for which we want resource id.
Return Value: This function returns the int identifier of the given resource.
Example 1: In the below code example, we will print the id of the given resource.
PHP
<?php $res = tmpfile() ; // Print resource id of tmpfile echo get_resource_id($res); ?> |
Output:
4
Example 2: In the below code example, we are opening a text file and then returning his resource id. It may be resource id will be different according to your computer.
PHP
<?php $res = fopen("text.txt", "rb"); echo get_resource_id($res); ?> |
Output:
5
Reference: https://www.php.net/manual/en/function.get-resource-id.php
