Simple example of displaying and releasing memory in php

Introducing an example of displaying and releasing memory in PHP. It is very simple. It mainly focuses on the usage of the memory_get_usage() function.

Code:

<?php
//显示与释放内存
//以下数字取决于linux系统类型与版本
 
echo memory_get_usage() . "\n"; // 36640
 
$a = str_repeat("Hello", 4242);
 
echo memory_get_usage() . "\n"; // 57960
 
unset($a);
 
echo memory_get_usage() . "\n"; // 36744
?>