容易 正则表达式

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Release: 2016-06-13 11:11:20
Original
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简单 正则表达式

<br />$ss = "/\[\$?[\w\.]+\]/";<br />preg_match_all($ss, "[abc]", $mat);//[$abc] [abc]为啥匹都配不到<br />
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------解决方案--------------------
$ss = "/\[\\$?[\w]+\]/";<br />preg_match_all($ss, '[abc]vv[$def]', $mat);<br />print_r($mat);
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Array
(
    [0] => Array
        (
            [0] => [abc]
            [1] => [$def]
        )

)

------解决方案--------------------

引用:
引用:csdn一团糟。。。

$ss = "/\[\\$?[\w\.]+\]/";
或者
$ss = '/\[\$?[\w\.]+\]/';

4 楼
$ss = '/\[\$?[\w\.]+\]/'这个为啥匹配不到[abc]它

为什么不能匹配?
可以匹配啊。你有没试过??
$没转义是指变量。
在“”里 \$ 也是指变量。。。所以你要 \\$ 来转义才是指 "$" 这个字符。
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