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javascript - 正则表达式如何匹配.$^等符号，假如字符串中包含这些有特殊含义的字符

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Release： 2016-06-06 20:10:38
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如题
javascript - 正则表达式如何匹配.$^等符号，假如字符串中包含这些有特殊含义的字符

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如题
javascript - 正则表达式如何匹配.$^等符号，假如字符串中包含这些有特殊含义的字符

用反斜杠转义不就可以了吗

如果要匹配的内容中包括元字符使用\进行转义。

假如 有字符串user$009 那么写成

user$099

就行了

<code>\.\$\^\*\?\[\]\+</code>
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正则表达式中规定了一些具有特殊意义的字符即元字符，若要匹配这些元字符自身需要使用\进行转义。如果正则表达式的书写方式是构造函数形式，需要使用\\进行双重转义。

Related labels：
javascript php regular expression
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