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HomeBackend DevelopmentPHP Tutorial 惯用正则表达式的整理

常用正则表达式的整理
首先声明,此文非原创,不过对开发人员应该有帮助;

1.    平时做网站经常要用正则表达式,下面是一些讲解和例子,仅供大家参考和修改使用:

2.    "^\d+$"  //非负整数(正整数 + 0)

3.    "^[0-9]*[1-9][0-9]*$"  //正整数

4.    "^((-\d+)|(0+))$"  //非正整数(负整数 + 0)

5.    "^-[0-9]*[1-9][0-9]*$"  //负整数

6.    "^-?\d+$"    //整数

7.    "^\d+(\.\d+)?$"  //非负浮点数(正浮点数 + 0)

8.    "^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$"  //正浮点数

9.    "^((-\d+(\.\d+)?)|(0+(\.0+)?))$"  //非正浮点数(负浮点数 + 0)

10.    "^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$"  //负浮点数

11.    "^(-?\d+)(\.\d+)?$"  //浮点数

12.    "^[A-Za-z]+$"  //由26个英文字母组成的字符串

13.    "^[A-Z]+$"  //由26个英文字母的大写组成的字符串

14.    "^[a-z]+$"  //由26个英文字母的小写组成的字符串

15.    "^[A-Za-z0-9]+$"  //由数字和26个英文字母组成的字符串

16.    "^\w+$"  //由数字、26个英文字母或者下划线组成的字符串

17.    "^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$"    //email地址

18.    "^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$"  //url

19.    /^(d{2}|d{4})-((0([1-9]{1}))|(1[1|2]))-(([0-2]([1-9]{1}))|(3[0|1]))$/   //  年-月-日

20.    /^((0([1-9]{1}))|(1[1|2]))/(([0-2]([1-9]{1}))|(3[0|1]))/(d{2}|d{4})$/   // 月/日/年

21.    "^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$"   //Emil

22.    /^((\+?[0-9]{2,4}\-[0-9]{3,4}\-)|([0-9]{3,4}\-))?([0-9]{7,8})(\-[0-9]+)?$/     //电话号码

23.    "^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])$"   //IP地址
24.    
25.    匹配中文字符的正则表达式: [\u4e00-\u9fa5]
26.    匹配双字节字符(包括汉字在内):[^\x00-\xff]
27.    匹配空行的正则表达式:\n[\s| ]*\r
28.    匹配HTML标记的正则表达式:/.*|/
29.    匹配首尾空格的正则表达式:(^\s*)|(\s*$)
30.    匹配Email地址的正则表达式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
31.    匹配网址URL的正则表达式:^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$
32.    匹配帐号是否合法(字母开头,允许5-16字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$
33.    匹配国内电话号码:(\d{3}-|\d{4}-)?(\d{8}|\d{7})?
34.    匹配腾讯QQ号:^[1-9]*[1-9][0-9]*$
35.    
36.    
37.    元字符及其在正则表达式上下文中的行为:
38.    
39.    \ 将下一个字符标记为一个特殊字符、或一个原义字符、或一个后向引用、或一个八进制转义符。
40.    
41.    ^ 匹配输入字符串的开始位置。如果设置了 RegExp 对象的Multiline 属性,^ 也匹配 ’\n’ 或 ’\r’ 之后的位置。
42.    
43.    $ 匹配输入字符串的结束位置。如果设置了 RegExp 对象的Multiline 属性,$ 也匹配 ’\n’ 或 ’\r’ 之前的位置。
44.    
45.    * 匹配前面的子表达式零次或多次。
46.    
47.    + 匹配前面的子表达式一次或多次。+ 等价于 {1,}。
48.    
49.    ? 匹配前面的子表达式零次或一次。? 等价于 {0,1}。
50.    

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