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PHP正则表达式小结

Jun 13, 2016 pm 12:13 PM
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PHP正则表达式总结


.  匹配任何单个字符 比如a.c 可以是abc,asc,aac,

$ 匹配字符串的结尾 比如t$ 可以使最后一个字符是t的字符串

^ 匹配一行的开始 比如^a能够匹配以a为开头的字符串

* 匹配0或多个正好在他前面的字符。

\  转移符,例如\* 用来匹配*

[ ] 匹配[ ]中任何一个字符

[^c1-c2] 匹配[]除外的符号

[A-Za-z]匹配所有大小写

() 定义一个子模式

|  或运算

+ 匹配1或多个正好在他之前的那个字符

{i} {i,j} 匹配指定数目的字符


执行函数:

ereg(正则表达式,字符串)


if(ereg("^([a-zA-Z0-9_- ])+ @ ([a-zA-Z0-9_-] +(\.[a- zA-Z0-9_-])+ ",$srt)) //匹配邮箱格式


^([1-9]{1})+([0-9]{16})+([Xx0-9]{1})+ 身份证

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