Summary of php verification email addresses and IP addresses

This article shares with you the easiest way to verify your email address and IP address in php. For more information, see

This article shares with you the easiest way to verify your email address and IP address in php. For more information, see

In development, verification of email addresses, URLs, and numbers is a common example. The following describes the verification of email addresses, URLs, and numbers. For more information, see.

The sample code is as follows:

Public static function isEmail ($ email) {return preg_match ("/^ ([a-z0-9] * [-_ \.]? [A-z0-9] +) * @ ([a-z0-9] * [-_]? [A-z0-9] +) + [\.] [a-z] {2, 4} ([\.] [a-z] {2 })? $/I ", $ email);} public static function isNumber ($ num) {return is_numeric ($ num);} public static function isUrl ($ url, $ preg = false) {if ($ preg) {$ status = preg_match ("/^ ([^: \/]) + \: \/[\ w-] + \. [\ w -. \? \/] + $/", $ Url);} else {$ status = filter_var ($ url, FILTER_VALIDATE_URL);} return $ status ;}

Supplement: Use php built-in functions for operations.

Php verification email, the Code is as follows:

$ Email = 'fengdingbo @ gmail.com '; $ result = filter_var ($ email, FILTER_VALIDATE_EMAIL); var_dump ($ result); // string (20) "fengdingbo@gmail.com"

Php verifies the url address. The Code is as follows:

$ Url = "http://www.jb51.net"; $ result = filter_var ($ url, FILTER_VALIDATE_URL); var_dump ($ result); // string (25) "http://www.jb51.net"

Php verifies the IP address. The Code is as follows:

$ Url = "192.168.1.110"; $ result = filter_var ($ url, FILTER_VALIDATE_IP); var_dump ($ result); // string (13) "192.168.1.110" // This method can also be used to verify ipv6. $ Url = "2001: DB8: 2de: e13"; $ result = filter_var ($ url, FILTER_VALIDATE_IP); var_dump ($ result); // string (17) "2001: DB8: 2de: e13"

The above is the easiest way to verify the mailbox and IP address in php, and I hope it will help you learn.

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