<?php 

echo $m1 = memory_get_usage(); 

echo "<br />";

 $var_string="123";

echo $m2 = memory_get_usage()-$m1; 

echo "<br />";

 $n=123;

echo $m3 = memory_get_usage()-$m1-$m2; 

echo "<br />";

 $f=123.00;

echo $m4 = memory_get_usage()-$m1-$m2-$m3; 

echo "<br />";

 $var_array=array("123");

echo $m5 = memory_get_usage()-$m1-$m2-$m3-$m4; 

?>

这段代码，任务中显示消耗内存为：624056   328   288  288  632  

而我执行出来的结果为：217672   320   272   272   576