php手動釋放內存

<?php $s = str_repeat('1',1024); $b = &$s; $m=memory_get_usage(); //獲取當前佔用內存 echo $m."\n"; //unset($s); //$s = null; $mm = memory_get_usage(); //unset()後再查看當前佔用內存 echo $mm . "\n"; echo $m -$mm ;

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