Collection and supplement of common PHP regular expressions

Regular expressions have always been a headache for me, but regular expressions are inseparable in my work. Regular expressions are widely used in code, vim editor, awk, and other Linux commands. This is a common regular expression in PHP code I have collected and tested. First, create a test function:

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Function regTest ($ pattern, $ str ){ Var_dump (preg_match ($ pattern, $ str )); Preg_match_all ($ pattern, $ str, $ matches ); Var_dump ($ matches ); Var_dump (preg_replace ($ pattern, $ str, 'test ')); }

1. Match Chinese characters

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$ Pattern = "/[x {4e00}-x {9fa5}]/u "; $ Str = "-feiyan "; RegTest ($ pattern, $ str ); // Output results in sequence // Int (1) // Array (1) {[0] => array (2) {[0] => string (3) "fei" [1] => string (3) "Success "}} // String (28) "TestTest-feiyan"

On the Chinese character matching, many online to the "[u4e00-u9fa5]", this regular expression is not necessarily completely correct.

2. Match tab indentation, spaces, and line breaks

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$ Pattern = "/[x {4e00}-x {9fa5}]/u "; $ Str = "-feiyan "; RegTest ($ pattern, $ str ); // Output results in sequence // Int (1) // Array (1) {[0] => array (2) {[0] => string (3) "fei" [1] => string (3) "Success "}} // String (28) "TestTest-feiyan" // String (21) "HelloTestTest, TestPHP"

3. Matching Email addresses

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$ Pattern = "[w + ([-+.] w +) * @ w + ([-.] w + )*. w + ([-.] w +) *] "; $ Str = 'if you have any questions, contact your service@lenovo.com or contact@ibm.com. '; RegTest ($ pattern, $ str ); // Output results in sequence // Int (1) // Array (4) {[0] => array (2) {[0] => string (18) "service@lenovo.com" [1] => string (15) "contact@ibm.com"} [1] => array (2) {[0] => string (0) "" [1] => string (0) ""} [2] => array (2) {[0] => string (0) "" [1] => string (0) ""} [3] => array (2) {[0] => string (0) "" [1] => string (0 )""}} // String (41) "If you have any questions, contact Test or Test. "

  
// Use the Filter function
Filter_var ($ email, FILTER_VALIDATE_EMAIL );

Generally, I do not write regular expressions to verify the email address. Using the built-in filter function of PHP can easily verify the email address.

4. Match the Chinese mobile phone number and phone number

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// Fixed phone match $ Pattern = "[d {3, 4}-d {7, 8}]"; $ Str = 'contact number 010-12345678 '; RegTest ($ pattern, $ str );    // The simplest matching method is mobile phone number matching. $ Pattern = "[1d {10}]"; $ Str = 'contact number 15812345678 '; RegTest ($ pattern, $ str );

5. Match the image address in HTML

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$ Pattern = '/<[img | IMG]. *? Src = ['| "] (. *? (? : 2.16.gif |. jpg]) ['| "]. *? [/]?> /'; $ Str = ' '; RegTest ($ pattern, $ str ); /** * Verify the ZIP code * @ Param string $ value * @ Param string $ match * @ Return boolean */ Public static function isPostcode ($ value, $ match = '/d {6 }/'){ $ V = trim ($ value ); If (empty ($ v )) Return false; Return preg_match ($ match, $ v );     } /** * Verify the IP address * @ Param string $ value * @ Param string $ match * @ Return boolean */ Public static function isIP ($ value, $ match = '/^ (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1-9] {1} [0-9] {1} | [1-9]). (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [1-9] | 0 ). (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [1-9] | 0 ). (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [0-9]) $ /'){ $ V = trim ($ value ); If (empty ($ v )) Return false; Return preg_match ($ match, $ v );     } /** * Verify the ID card number * @ Param string $ value * @ Param string $ match * @ Return boolean */ Public static function isIDcard ($ value, $ match = '/^ d {6} (1 [89]) | (2d) d {2} (0d) | (1 [0-2]) (3 [01]) | ([0-2] d) d {3} (d | X) $/I '){ $ V = trim ($ value ); If (empty ($ v )) Return false; Else if (strlen ($ v)> 18) Return false; Return preg_match ($ match, $ v );     } /** ** * Verify URLwww.111cn.net * @ Param string $ value * @ Param string $ match * @ Return boolean */ Public static function isURL ($ value, $ match = '/^ (http ://)? (Https ://)? ([Wd-] +.) + [w-] + (/[dw -./? % & =] *)? $ /'){ $ V = strtolower (trim ($ value )); If (empty ($ v )) Return false; Return preg_match ($ match, $ v );     }

Supplement

Form verification match
Verification account, starting with a letter, can be 5-16 bytes, can contain letters and numbers underline: ^ [a-zA-Z] [a-zA-Z0-9 _] {} $

Verification account, cannot be blank, cannot have spaces, can only be English letters: ^ S + [a-z A-Z] $

Account verification. No space is allowed, and no number is allowed: ^ d + $

Verify the user password. It must start with a letter and be in the range of 6-18: ^ [a-zA-Z] w {5, 17} $

Check whether ^ % & ',; =? $ And other characters: [^ % & ',; =? $ X22] +

Matching Email address: w + ([-+.] w +) * @ w + ([-.] w +) *. w + ([-.] w + )*

Match Tencent QQ number: [1-9] [0-9] {4 ,}

The matching date can only be in the format of 2004-10-22: ^ d {4}-d {1, 2}-d {1, 2} $

Match Chinese phone number: ^ d {3}-d {8} | d {4}-d {7, 8} $
Comments: matching forms such as 010-12345678 or 0571-12345678 or 0831-1234567

Match China Zip code: ^ [1-9] d {5 }(?! D) $

Matched ID card: d {14} (d {4} | (d {3} [xX]) | d {1 })
Note: the ID card of China is 15 or 18 characters

Cannot be blank and more than 20 bytes: ^ [s | S] {20,} $