Unset function clears memory

From , 3 Years ago, written in PHP, viewed 222 times.

<?php  
$s=str_repeat('1',255);  //产生由255个1组成的字符串  
$m=memory_get_usage();  //获取当前占用内存  
unset($s);  
$mm=memory_get_usage();  //unset()后再查看当前占用内存  
echo $m-$mm;  
?>  

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Unset function clears memory

Reply to "Unset function clears memory"