Php email address regular expression verification

This article mainly introduces php mail address regular expression verification. the php language is used to implement the e-mail address verification program, which uses the php regular expression library, if you are interested, you can refer to the verification we most often encounter, that is, email address verification. Websites are common. Various web scripts also use the regular expression to verify the entered email address and determine whether the email address is valid. Some can also separate the username and domain name. Now we use PHP to implement the email address verification program, which uses the PHP regular expression library.
The source code is as follows:

<? Php header ("Content-Type: text/html; charset = UTF-8"); $ reply = ""; if (isset ($ _ POST ["email_address"]) {$ email_address = $ _ POST ["email_address"]; $ pattern = "/^ ([0-9A-Za-z \-_ \.] +) @ ([0-9a-z] + \\. [a-z] {2, 3 }(\\. [a-z] {2 })?) $/I "; if (preg_match ($ pattern, $ email_address) {$ reply =" the email address you entered is valid.

\ N "; $ user_name = preg_replace ($ pattern," $1 ", $ email_address); $ domain_name = preg_replace ($ pattern," $2 ", $ email_address ); $ reply. = "user name :". $ user_name."
\ N "; $ reply. =" domain name: ". $ domain_name ."
\ N ";} else {$ reply =" the email address you entered is invalid ";}}?>Email address verification procedureEmail Address Verification Program <? Php echo $ reply;?>

The above is the php email address regular expression verification shared for everyone. I hope it will be helpful for everyone's learning.