PHP: Validate Email Address

[Jordan]

This function actually validates an email address against an MX record. I found this somewhere and modified it slightly.

Name: validateemail.php
Description: Validates an email against MX records

Usage:
include validateemail.php
Pass an email to validateEmail();
Example:

PHP Code:

 if (validateEmail("somename@domain.com")) {
//code block
} 


[skilletsteve]

what exactly are MX records?
do you need to have your own set of MX records for it to check against?

[Jordan]

MX records are records added in the DNS file. MX records are for email inside of the DNS system. The script I provided above will actually check to see if the mail/domain exists.

[moguai]

This looks great, thanks

[lambert1969]

Looks great!, thanks!

[yosutanto]

Thanks a lot! will try it now.

[John]

Im working on a whole validation class, here is my Email Validation

PHP Code:

     /**
     *@param $Email is the email address you wish to validate
     *@return $result[0] will either be true or false. True
     *    meaning the email is valid - False meaning the email
     *    meaning the email is invalid.
     *@return $result[1] is a brief message explaining the result.
     */
    function VerifyEmail ($Email)
    {

        $result = array();

        #Use a regular expression to make sure the $Email string is in proper format
        #<username>@<domain>.<suffix> || <username>@<subnet>.<domain>.<suffix> 
        if (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $Email)) {
            $result[0] = false;
            $result[1] = "$email is not properly formatted.";
            return $result;
        } 


        list ($Username, $Domain) = split ("@", $Email);

        #Verify the MX record.
        if (getmxrr($Domain, $MXHost)) {
            $result[0] = true;
            $result[1] = "$email appears to be valid.";
            return $result;
        } else {
            #Establish a connection to the server.
            if (@fsockopen($Domain, 25, $errno, $errstr, 30)) {
                $result[0] = true;
                $result[1] = "$email appears to be valid.";
                return $result;
            } else  {
                $result[0] = false;
                $result[1] = "Cannot connect to the server.";
                return $result;
            }
        }
    } //End VerifyEmail 


Usage:

PHP Code:

    $result =  VerifyEmail ($Email);
    if($result[0]) {
        //email is valid
    } 


[sh44n]

Nice one

[tmarsha4]

very cool, ill be using this for sure. thanks!

[matthewk]

Thanks, wanting to check it out.