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get_resource_id

(PHP 8)

get_resource_id Returns an integer identifier for the given resource

说明

get_resource_id ( resource $res ) : int

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

参数

res

The evaluated resource handle.

返回值

The int identifier for the given res.

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

范例

示例 #1 get_resource_id() example

<?php
$handle 
fopen('./storage/logs/lumen.log''rt');

echo (int) 
$handle "\n\n";

echo 
get_resource_id($handle);

?>

以上例程会输出:

698

698

参见

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