大家帮我看哈这个输出是什么？谢谢

[回南山种豆]

$test = 'aaaaaa';
$abc = & $test;
unset($test);

echo $abc;

[rczjp]

echo memory_get_usage()."\n";
$a = str_repeat("A", 1000);
echo memory_get_usage()."\n"; 
$b=&$a;  //下面的内存大小不会变，unset只是解除$a的绑定
unset($a);
echo memory_get_usage()."\n";

[饭fan有引力]

aaaaaa，哈

[零七九三]

经测试：打印出aaaaaa (其实不需要测试的嘛)