Summary of PHP regular expressions

This article talks about PHP's regular expressions. You may feel that regular expressions are scary and difficult when you hear them. Let's take a look directly todayPHP regular expressionsIs it difficult or not? We have made a summary of PHP regular expressions. Let’s take a look!

"^\d+$"　　//非负整数（正整数 + 0） 
 "^[0-9]*[1-9][0-9]*$"　　//正整数 
"^((-\d+)|(0+))$"　　//非正整数（负整数 + 0） 
"^-[0-9]*[1-9][0-9]*$"　　//负整数 
"^-?\d+$"　　　　//整数 
"^\d+(\.\d+)?$"　　//非负浮点数（正浮点数 + 0） 
"^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$"　　//正浮点数
"^((-\d+(\.\d+)?)|(0+(\.0+)?))$"　　//非正浮点数（负浮点数 + 0） 
"^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$"　　//负浮点数
"^(-?\d+)(\.\d+)?$"　　//浮点数 
"^[A-Za-z]+$"　　//由26个英文字母组成的字符串 
"^[A-Z]+$"　　//由26个英文字母的大写组成的字符串 
"^[a-z]+$"　　//由26个英文字母的小写组成的字符串 
"^[A-Za-z0-9]+$"　　//由数字和26个英文字母组成的字符串 
"^\w+$"　　//由数字、26个英文字母或者下划线组成的字符串 
"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$"　　　　//email地址 
"^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$"　　//url 
/^(d{2}|d{4})-((0([1-9]{1}))|(1[1|2]))-(([0-2]([1-9]{1}))|(3[0|1]))$/   //  年-月-日
/^((0([1-9]{1}))|(1[1|2]))/(([0-2]([1-9]{1}))|(3[0|1]))/(d{2}|d{4})$/   // 月/日/年
"^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$"   //Emil
/^((\+?[0-9]{2,4}\-[0-9]{3,4}\-)|([0-9]{3,4}\-))?([0-9]{7,8})(\-[0-9]+)?$/     //电话号码
"^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])$"   //IP地址

1. Non-negative integer: ^\d+$
2. Positive integer: ^[0-9]*[1-9][0-9]*$
3. Non-negative integer Positive integer: ^((-\d+)|(0+))$
4, Negative integer: ^-[0-9]*[1-9][0-9]*$
5, Integer: ^-?\d+$
6. Non-negative floating point number: ^\d+(\.\d+)?$
7. Positive floating point number: ^((0-9)+\.[0 -9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9 ]*[1-9][0-9]*))$
8. Non-positive floating point numbers: ^((-\d+\.\d+)?)|(0+(\.0+)? ))$
9. Negative floating point number: ^(-((positive floating point number regular expression)))$
10. English string: ^[A-Za-z]+$
11. English uppercase string: ^[A-Z]+$
12, English lowercase string: ^[a-z]+$
13, English character and numeric string: ^[A-Za-z0-9]+$
14. Alphanumeric and underlined string: ^\w+$
15. E-mail address: ^[\w-]+(\.[\w-]+)*@[\w-]+(\. [\w-]+)+$
16. URL: ^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)* ))*(\?\s*)?$
Or: ^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/= \?%\-&_~`@[\]\':+!]*([^<>\"\"])*$
17, Postal code: ^[1-9]\d {5}$
18, Chinese: ^[\u0391-\uFFE5]+$
19, Phone number: ^((\(\d{2,3}\))|(\d{3 }\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1 ,4})?$
20. Mobile phone number: ^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$
21. Double-byte characters (including Chinese characters): ^\x00-\xff
22. Match leading and trailing spaces: (^\s*)|(\s*$) (like vbscriptSuch a trim function)
23. Match HTML tags: <(.*)>.*<\/\1>|<(.*) \/>
24. Match empty Line: \n[\s| ]*\r
25. Extract the network link in the information: (h|H)(r|R)(e|E)(f|F) *= *('| ")?(\w|\\|\/|\.)+('|"| *|>)?
26. Extract the email address in the information: \w+([-+.]\w+ )*@\w+([-.]\w+)*\.\w+([-.]\w+)* ​
27. Extract the picture link in the information: (s|S) (r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
28. Extraction IP address in the information: (\d+)\.(\d+)\.(\d+)\.(\d+)
29. Extract the Chinese mobile phone number in the information: (86)*0*13\d {9} ​
30. Extract the Chinese landline phone number in the information: (\(\d{3,4}\)|\d{3,4}-|\s)?\d{8} ​
31. Extract Chinese phone numbers (including mobile and landline phones) from the information: (\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14 }     
32. Extract the Chinese postal code in the information: [1-9]{1}(\d+){5}      
33. Extract the floating point number (i.e. decimal) in the information: (-?\d *)\.?\d+ ​
34. Extract any number in the information: (-?\d*)(\.\d+)? ​
35. IP: (\d+)\.(\d+) \.(\d+)\.(\d+) ​
36. Telephone area code: /^0\d{2,3}$/ ​
37. Tencent QQ number: ^[1-9]*[1 -9][0-9]*$
38. Account number (starting with a letter, allowing 5-16 bytes, allowing alphanumeric underscores): ^[a-zA-Z][a-zA-Z0-9_] {4,15}$
39, Chinese, English, numbers and underline: ^[\u4e00-\u9fa5_a-zA-Z0-9]+$

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