<?php$curMac = '00E031001774';$preMac = '00E012013732';if($curMac != $preMac){ echo 'not not';}else{ echo 'yes yes';}?>//该片段来自于http://www.codesnippet.cn/detail/1203201511854.html
来源: http://www.codesnippet.cn/detail/1203201511854.html