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preg_match正则基础题

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Release： 2016-06-23 14:01:03
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<?PHPpreg_match("/^(http:\/\/)?([^\/]+)/i","http://www.php.net/index.html",$arr);print_r($arr);?>
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最后结果：http://www.php.net

^(http:\/\/)?可以匹配http://  可以理解

为什么([^\/]+)可以匹配 www.php.net 不解？


回复讨论(解决方案)

[^\/]+表示匹配多个不是‘/’的字符 当然就可以匹配到www.php.net了 因为该字符没有 / 字符

[^\/]+ 表示匹配除了字符”/“的所有字符，当然包括 www.php.net

理解好[^ \/]这个就可以了，表示除“/”这个以外的任何东西，[^ ]这个是特定的，"\"是转义符

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