state=aaaaaaaaaaaaaaa &state=aaaaaaaaaaaa mstate=aaaaaaaaaaaaaaaaaa mstate=aaaaaa&state=aaaaaaaaaaaaaaa&ccc=aaaa 我的需求是只截取以state=开头的部分，如果是上面第四种情况只截取state=aaaaaaaaaaaaaaa
PHP中文网2017-06-28 09:28:33
/\bstate=[^&\n\r]*?(?=[&\n\r])/g
结果：
ringa_lee2017-06-28 09:28:33
最后自己是这样写的(\b)state=([^&\s]*)
(\b)state=([^&\s]*)
