PHP regular expression (add 177 mobile phone number)

This time I will bring you PHP regular expressions (add 177 mobile phone number), what are the precautions when using PHP regular expressions (add 177 mobile phone number), as follows This is a practical case, let’s take a look at it.

First look at the regular expression mind map:

## 1. Expression of check digits Formula ##1 Number:

^[0-9]*$

2 n-digit number:
^\d{n}$
3 Numbers with at least n digits:
^\d{n,}$
4 Numbers with m-n digits:
^\d{m,n}$
5 Numbers starting with zero and non-zero:
^(0|[1-9][0-9]*)$
6 Number starting with non-zero and 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 There are two digits Positive real numbers with decimal places:
^[0-9]+(.[0-9]{2})?$
10 Positive real numbers 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 integers:
^-[1-9]\d*|0$ or ^((-\d+)|(0+))$
15 Non-negative floating point numbers:
^\ 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 The length is 3- All characters of 20:
^.{3,20}$
4 A string consisting of 26 English letters:
^[A-Za-z]+$
5 consisting of 26 A string of uppercase English letters:
^[A-Z]+$
6 A string of 26 lowercase English letters:
^[a-z]+$
7 A string 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 included Underline and other symbols:
^[\u4E00-\u9FA5A-Za-z0-9]+$ or ^[\u4E00-\u9FA5A-Za-z0-9]{2,20}$
11 can be entered Containing characters such as ^%&',;=?$\":
[^%&',;=?$\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 numbers ("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-digit ID card:
^[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 6~18, 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, and cannot use special characters , length 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 kinds of money We can accept the representation form: "10000.00" and "10,000.00", and "10000" and "10,000" without "cent":
^[1-9][0-9]*$
17, 2 .This means any number that does not start with 0. However, it also means that a character "0" is not passed, 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 means a 0 or a number that may be negative and does not start with 0. Let the user start with 0. Remove the negative sign too, because money cannot be negative. .What we need to add below is to explain the possible decimal part:
^[0-9]+(.[0-9]+)?$
20, 5. It must be noted that there should be at least 1 after the decimal point There is 1 digit, so "10." is not passed, but "10" and "10.2" are passed:
^[0-9]+(.[0-9]{2})?$
21. 6. In this way, we stipulate that there must be two decimal places after the decimal point. 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 should consider the comma in the number. 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, Instead of having to:
^([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 by "*" if you think an empty string is acceptable (strange, why?) Finally, don't forget 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 words Section characters:
[^\x00-\xff]
(including Chinese characters, can be used to 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 for HTML tags:
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)

#I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website !

Recommended reading:

The relationship between lastIndex and regular expressions

Regular re.sub & re in python. subn

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