get_resource_id

(PHP 8)

get_resource_id Returns an integer identifier for the given resource

说明

get_resource_id(resource $resource): int

This function provides a type-safe way for generating the integer identifier for a resource.

参数

resource

The evaluated resource handle.

返回值

The int identifier for the given resource.

This function is essentially an int cast of resource to make it easier to retrieve the resource ID.

范例

示例 #1 get_resource_id() produces the same result as an int cast

<?php
$handle 
fopen("php://stdout""w");

echo (int) 
$handle "\n";

echo 
get_resource_id($handle);

?>

以上例程的输出类似于:

698
698

参见

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