The most complete PHP regular expression in history_regular expression

Regular expression, everyone should often use it in development. Now many development languages ​​​​have regular expression applications, such as javascript, java, .net, php Wait, today I will introduce to you the most complete PHP regular expression (mobile phone number needs to be added with 177-***), let’s take a look together

First, let’s take a look at the regular expression Mind map:

1. Expression for checking numbers

1 Number:
^[0-9]*$
2 n-digit number:
^\d{n}$
3 Number with at least n digits:
^\d{n,}$
4 Number with m-n digits:
^\d{m, n}$
5 Numbers starting with zero and non-zero:
^(0|[1-9][0-9]*)$
6 Non-zero Starting number with up to two decimal places:
^([1-9][0-9]*)+(.[0-9]{1,2})?$
7 Positive or negative number with 1-2 decimal places:
^(\-)?\d+(\.\d{1,2})?$
8 Positive Numbers, negative numbers, and decimals:
^(\-|\+)?\d+(\.\d+)?$
9 Positive real numbers with two decimal places:
^[0-9]+(.[0-9]{2})?$
10 A positive real number with 1~3 decimal places:
^[0- 9]+(.[0-9]{1,3})?$
11 Non-zero positive integer:
^[1-9]\d*$ or ^( [1-9][0-9]*){1,3}$ or ^\+?[1-9][0-9]*$
12 Non-zero negative integer:
^\-[1-9][]0-9"*$ or ^-[1-9]\d*$
13 Non-negative integer:
^ \d+$ or ^[1-9]\d*|0$
14 Non-positive integer:
^-[1-9]\d*|0$ or ^(( -\d+)|(0+))$
15 Non-negative floating point number:
^\d+(\.\d+)?$ or ^[1-9]\d* \.\d*|0\.\d*[1-9]\d*|0?\.0+|0$
16 Non-positive floating point number:
^( (-\d+(\.\d+)?)|(0+(\.0+)?))$ or ^(-([1-9]\d*\.\d*|0\.\d *[1-9]\d*))|0?\.0+|0$
17 Positive floating point number:
^[1-9]\d*\.\ d*|0\.\d*[1-9]\d*$ or ^(([0-9]+\.[0-9]*[1-9][0-9]*)|( [0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$
18 Negative floating point number:
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$ or ^ (-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\ .[0-9]+)|([0-9]*[1-9][0-9]*)))$
19 Floating point number:
^(- ?\d+)(\.\d+)?$ or ^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\. 0+|0)$

2. Expression of check characters

1 Chinese characters:
^[\u4e00-\u9fa5]{0,}$
2 English and numbers:
^[A-Za-z0-9]+$ or ^ [A-Za-z0-9]{4,40}$
3 All characters with length 3-20:
^.{3,20}$
4 A string consisting of 26 English letters:
^[A-Za-z]+$
5 A string consisting of 26 uppercase English letters:
^[A-Z]+$
6 A string consisting of 26 lowercase English letters:
^[a-z]+$
7 A string consisting of numbers and 26 A string consisting of English letters:
^[A-Za-z0-9]+$
8 A string consisting of numbers, 26 English letters or underscores:
^\w+$ or ^\w{3,20}$
9 Chinese, English, numbers including underscores:
^[\u4E00-\u9FA5A-Za-z0-9_ ]+$
10 Chinese, English, numbers but not including underscores and other symbols:
^[\u4E00-\u9FA5A-Za-z0-9]+$ or ^[\u4E00- \u9FA5A-Za-z0-9]{2,20}$
11 You can enter characters containing ^%&',;=?$\":
[^%&' ,;=?$\x22]+
12 It is forbidden to enter characters containing ~:
[^~\x22]+

3. Expression of special needs

1. Email address:
^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-. ]\w+)*$
2, domain name:
[a-zA-Z0-9][-a-zA-Z0-9]{0,62}(/.[ a-zA-Z0-9][-a-zA-Z0-9]{0,62})+/.?
3, InternetURL:
[a-zA-z ]+://[^\s]* or ^http://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)? $
4, mobile phone number:
^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7| 8|9]|18[0|1|2|3|5|6|7|8|9])\d{8}$
5, phone number("XXX-XXXXXXX ", "XXXX-XXXXXXXX", "XXX-XXXXXXX", "XXX-XXXXXXXX", "XXXXXXX" and "XXXXXXXX):
^(\(\d{3,4}-)|\d{3.4} -)?\d{7,8}$
6 Domestic phone number(0511-4405222, 021-87888822):
\d{3}-\d{8}|\ d{4}-\d{7}
7, ID number:
15 or 18-digit ID number:
^\d{15}|\d{18} $
15 ID cards:
^[1-9]\d{7}((0\d)|(1[0-2]))(([0| 1|2]\d)|3[0-1])\d{3}$
18-digit ID card:
^[1-9]\d{5}[ 1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4} $
8. Short ID number (numbers, letters ending in x):
^([0-9]){7,18}(x|X)?$
Or
^\d{8,18}|[0-9x]{8,18}|[0-9X]{8,18}?$
9, is the account legal (starting with a letter , 5-16 bytes allowed, alphanumeric underscores allowed):
^[a-zA-Z][a-zA-Z0-9_]{4,15}$
10 , Password (starting with a letter, length between 6 and 18, can only contain letters, numbers and underscores):
^[a-zA-Z]\w{5,17}$
11. Strong password (must contain a combination of uppercase and lowercase letters and numbers, special characters cannot be used, the length is between 8-10):
^(?=.* \d)(?=.*[a-z])(?=.*[A-Z]).{8,10}$
12. Date format:
^\d{4 }-\d{1,2}-\d{1,2}
13. 12 months of the year (01～09 and 1～12):
^(0 ?[1-9]|1[0-2])$
14, 31 days of a month (01～09 and 1～31):
^((0?[ 1-9])|((1|2)[0-9])|30|31)$
15, money input format:
16, 1. There are four acceptable representations of money: "10000.00" and "10,000.00", and "10000" and "10,000" without "cents":
^[1-9][0-9] *$
17. 2. This means any number that does not start with 0, but it also means that a character "0" does not pass, so we use the following form:
^(0|[1-9][0-9]*)$
18 , 3. A 0 or a number that does not start with 0. We can also allow a negative sign at the beginning:
^(0|-?[1-9][0-9]*)$
19, 4. This represents a 0 or a number that may be negative and does not start with 0. Let the user start with 0. Also remove the negative sign, because money can never be negative. What we need to add next is to indicate the possible decimal part:
^[0-9]+( .[0-9]+)?$
20, 5. It must be noted that there should be at least 1 digit after the decimal point, so "10." is not passed, but "10" and " 10.2" is passed:
^[0-9]+(.[0-9]{2})?$
21. 6. In this way, we stipulate that there must be two decimal points after Bit, if you think it is too harsh, you can do this:
^[0-9]+(.[0-9]{1,2})?$
22, 7. This allows the user to write only one decimal place. Now we have to consider commas in numbers. We can do this:
^[0-9]{1,3}(,[0-9]{3 })*(.[0-9]{1,2})?$
23, 8.1 to 3 numbers, followed by any comma + 3 numbers, the comma becomes optional, not required ：
^([0-9]+|[0-9]{1,3}(,[0-9]{3})*)(.[0-9]{1,2 })?$
24. Note: This is the final result. Don’t forget that "+" can be replaced with "*" if you think an empty string is acceptable (strange, why?) Finally, Don't forget to remove the backslash when using the function. Common mistakes are here
25, xml file:
^([a-zA-Z]+ -?)+[a-zA-Z0-9]+\\.[x|X][m|M][l|L]$
26, regular expression of Chinese characters:
[\u4e00-\u9fa5]
27, double-byte characters:
[^\x00-\xff]
(including Chinese characters, can be used Calculate the length of the string (the length of a double-byte character is counted as 2, and the length of an ASCII character is counted as 1))
28. Regular expression for blank lines: \n\s*\r (can be used to delete blank lines )
29, Regular expression of HTML tag:
<(\S*?)[^>]*>.*? |<.*? /> (The version circulating on the Internet is too bad, the above one can only partially work, and it is still powerless for complex nested tags)
30. Regular expression for leading and trailing whitespace characters:^\s*|\s*$ or (^\s*)|(\s*$) (can be used to delete whitespace characters at the beginning and end of the line (including spaces, tabs, form feeds, etc.) ), very useful expression)
31, Tencent QQ number: [1-9][0-9]{4,} (Tencent QQ number starts from 10000)
32, China postal code ：[1-9]\d{5}(?!\d) (China postal code is 6 digits)
33, IP address: \d+\.\d+\ .\d+\.\d+ (useful when extracting IP address)

The above is the most complete PHP regular expression in history introduced by the editor (the mobile phone number needs to be added 177-***), I hope it will be helpful to everyone.

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