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正则匹配解决方案
- WBOYOriginal
- 2016-06-13 12:33:43791browse
正则匹配
$url="http://www.baidu.comhttp://www.163.com";
$u=preg_replace("/\.\w+\./i",".231.",$url);
echo $u;
结果：http://www.231.comhttp://www.231.com
吧\w换成 . 后
结果：http://www.231.com
为什么
------解决方案--------------------
默认是贪婪匹配
$u=preg_replace("/\..+?\./i",".231.",$url); //这样就行了
------解决方案--------------------
? 表示匹配0次或1次
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