Hey,
What I’m trying to do is verify an email field in a form. I need the php to check and make sure that the data entered into the email field is of valid format ([email protected]). I’m looking for the code to run that check on the email field.
Any help would be great,
Nick
Use the preg_match function:
http://ca2.php.net/manual/en/function.preg-match.php
The regex for an e-mail is “^[a-zA-Z0-9_.-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,4}$”
Tarential, i’ve pulled this off of someone elses script… any reason for the excess statements in it? I havn’t a clue what the ending is talking about… the beginning yes but about 3/4 way through I loose it…
[php]
^[_a-z0-9-]+(.[_a-z0-9-]+)@(0-9a-z.)+[a-z]{2}([zmuvtg]|fo|me)?$
[/php]
that has been what i’ve used for email validatno for a year or so now, and no problems as far as i can tell…
Drewbee: That regex is SEVERLY lacking. Unless you use the /i in which case it is only partially lacking, and somewhat redundant. Use mine. Its the one I got off the PHP site.
Ok.
What is that going on at tne end…
[php]
zmuvtg]|fo|me
[/php]
?
It is verifying the “.com” or “.net” or whatever. It works, but not in all cases. New domain types and such are added all the time.
getmxrr and checkdnsrr allow you to check for dns and MX entries. Zend has a pretty nice verification script:
Zend script
thats one seriously wild email validation script
Yep. Thats what I’d call an e-mail verification script on steroids.
This will check the domain to make sure it is a valid domain using checkdnsrr. It doesn’t work on php for win32, but it works great on *nix.
Test it out. Just replace the “$your_email_value” with your email field value.
list($userName, $mailDomain) = split("@", $your_email_value);
if (checkdnsrr($mailDomain, "MX")) {
// this is a valid email domain!
}
else {
// this email domain doesn't exist!
}
Actually, since email addresses cam come in the form of
Tahongawaka <"spam trap"@rallycentral.us (this address is a spam trap)>, the regex is a bit more complex than you think. Addresses may have comments, and they may be nested. They may also have a “non address” part, quotes, sub-domains, ascii characters, and more! (See RFC 822)
When it comes down to it, there is [i]absolutely no way[/i] to ensure a particular address actually reaches someone. Period.
The regex for an email address with only one set of nested comments is closer to
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[/code]
Holy
I’m glad at least someone knows how to do regular expressions heaven knows I can’t!
i use this all the time in my scripts, never failed once…
<?PHP
function EmailIsValid($email) {
list($local, $domain) = explode("@", $email);
$pattern_local = '^([0-9a-z]*([-|_]?[0-9a-z]+)*)(([-|_]?).([-|_]?)[0-9a-z]*([-|_]?[0-9a-z]+)+)*([-|_]?)$';
$pattern_domain = '^([0-9a-z]+([-]?[0-9a-z]+)*)(([-]?).([-]?)[0-9a-z]*([-]?[0-9a-z]+)+)*.[a-z]{2,4}$';
$match_local = eregi($pattern_local, $local);
$match_domain = eregi($pattern_domain, $domain);
if ($match_local && $match_domain) {
return 1;
} else {
return 0;
}
}
?>