Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you some common regular expressions. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

1. Check password strength

The strength of the password must be a combination of uppercase and lowercase letters and numbers, cannot use special characters, and is between 8 and 10 in length.

^ (? = .*\\ d) (? = .* [amurz]) (? = .* [Amurz]). {8Magol 10} $

two。 Check Chinese

The string can only be in Chinese.

^ [\ u4e00 -\ u9fa5] {0,} $

3. A string consisting of numbers, 26 letters, or underscores

^\\ wish$

4. Verify E-Mail address

As with passwords, the following is a regular check statement for E-mail address compliance.

[\ w]? [\\ w] (?) [: [\\ w] * [\\ w])?

5. Check ID card number

Here is the regular check of the ID card number. 15 or 18.

15:

^ [1-9]\\ d {7} ((0\\ d) | (1 [0-2])) (([0 | 1 | 2]\\ d) | 3 [0-1])\\ d {3} $

18 bits:

^ [1-9]\\ d {5} [1-9]\\ d {3} ((0\\ d) | (1 [0-2])) (([0 | 1 | 2]\\ d) | 3 [0-1]))\\ d {3} ([0-9] | X) $

6. Check date

Date check in "yyyy-mm-dd" format, taking into account flat leap years.

^ (?: (! 0000) [0-9] {4}-(: 0 [1-9] | 1 [0-2])-(?: 0 [1-9] | 1 [0-9] | 2 [0-8]) | (?: 0 [13-9] | 1 [0-2])-(?: 29 | 30) | (?: 0 [13578] | 1 [02])-31) | (?: [0-9] {2} (?: 0 [48]) | 2468] [048] | [13579] [26]) | (?: 0 [48] | [2468] [048] | [13579] [26]) 00)-02-29) $

7. Check amount

Amount check, accurate to 2 decimal places.

^ [0-9] + (. [0-9] {2})? $

8. Check the mobile phone number

The following is the regular expression of the domestic mobile phone number at the beginning of 13, 15 and 18. (the first two opening digits can be expanded according to the current domestic collection number)

^ (13 [0-9] | 14 [5 | 7] | 15 [0 | 1 | 2 | 3 | 6 | 7 | 8 | 9] | 18 [0 | 1 | 2 | 3 | 5 | 6 | 7 | 9])\\ d {8} $

9. Determine the version of IE

IE has not been completely replaced yet, and many pages still need to be version compatible. Here are the expressions for IE version checking.

^. * MSIE [5-8] (?:\. [0-9] +)? (?!. * Trident\ / [5-9]\ .0). * $

10. Verify IP-v4 address

IP4 regular statement.

\\ b (?: 25 [0-5] | 2 [0-4] [0-9] | [01]? [0-9] [0-9]?)\\.) {3} (?: 25 [0-5] | 2 [0-4] [0-9] | [01]? [0-9] [0-9]?)\\ b

11. Verify IP-v6 address

IP6 regular statement.

(([0-9a-fA-F] {1rect 4}:) {79a-fA-F 7} [0-9a-fA-F] {1pr 4} | ([0-9a-fA-F] {1pr 4}:) {1Mague 7}: | ([0-9a-fA-F] {1pr 4}:) {1pr 6}: [0-9a-fA-F] {1pr 4} | ([0-9a-fA-F] {1pm 4}:) {1pm 5} (: [0-9a-fA-F] {1pm 4}) {1pm 2}) | | ([0-9a-fA-F] {1score4}:) {19a-fA-F 4} (: [0-9a-fA-F] {1score4}) {19a-fA-F 3} | ([0-9a-fA-F] {1Power4}:) {19a-fA-F 3} (: [0-9a-fA-F] {1pr 4}) {1c4} | ([0-9a-fA-F] {1pr 4}:) {1pr 2} (: [0-9a-fA-F] {1pm 4}) {1pm 5} | ] {19a-fA-F 4}: (: [0-9a-fA-F] {1 9a-fA-F 4}) {1 9a-zA-Z 6}) | (: (: [0-9a-fA-F] {1 9a-zA-Z 4}) {1 9a-fA-F 7} |:) | (: [0-9a-fA-F] {0pr 4}) {0pr 4}% [0 -] {1 | |:: (ffff (: 0 {0 9a-fA-F 4}) {0Power1}:) {0ffff 1} ((25 [0-5]) | (2 [0-4] | 1 {0Power1} [0-9]) {0Magne1} [0-9]) {0Magne1} (25 [0-5] | (2 [0-4] | 1 {0quotient 1} [0-9]) {0jin1} [0-9]) | ([0-0] 1}:) {1pm 4}: (25) [0-5] | (2 [0-4] | 1 {0rect 1} [0-9]) {0rect 1} [0-9])\\.) {3jue 3} (25 [0-5] | (2 [0-4] | 1 {0jue 1} [0-9]))

twelve。 Check the prefix of URL

In application development, it is often necessary to distinguish between HTTPS and HTTP. The following expression can be used to extract a url prefix and then logically judge.

If (! s.match (/ ^ [a-zA-Z] +:\ / /)) {s = 'http://' + s;}

13. Extract URL links

The following expression filters out the URL in a piece of text.

^ (f | ht) {1} (tp | tps):\ /\ / ([\\ w -] +\\.) + [\\ w -] + (\ / [\\ w -. /?% & =] *)?

14. File path and extension check

Verify the file path and extension under windows (.txt file in the following example)

^ ([a-zA-Z]\\: |\)\ ([^\] +\) * [^\ /: *? "|] +\ .txt (l)? $

15. Extract Color Hex Codes

Sometimes you need to extract the color code from a web page, you can use the following expression.

^ # ([A-Fa-f0-9] {6} | [A-Fa-f0-9] {3}) $

16. Extract pictures from web pages

If you want to extract all the picture information from the page, you can use the following expression.

\\

] * [src] * = * [\ "\'] {0reco1} ([^\\"\\'\ >] *)

17. Extract page hyperlinks

Extract hyperlinks from html.

(] *) (href= "https?:\ /\ /) ((?! (: (?: (?: www\\.)?'. Implode ('| (?: www\\.), $follow_list).)) [^" rel= "external nofollow"] +) "((?. *\\ brel=) [^ >] *) (?: [^ >] *) >

18. Find the CSS attribute

With the following expression, you can search for a matching CSS attribute.

^\\ s * [a-zA-Z\\ -] +\\ s * [:] {1}\\ s [a-zA-Z0-9\\ s.#] + [;] {1}

19. Extract comments

If you need to remove comments from HMTL, you can use the following expression.

20. Match HTML tags

The tag attributes in HTML can be matched with the following expression.

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