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Validate an email address

I don't remember where this came from, but it's very useful for validating input from a form


function valid_email($email) {

  if( eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email) ) { 
    return true;
  }
  else { 
    return false;
  }

}
to php email regex by zdw on Tue Feb 14 22:26:15 GMT 2006 1 Comments

Pretty darn good Email validator

This regular expression was written by a friend of mine according to the email spec RFC2822. It should be near 100% coverage of email addresses assuming no leading or trailing whitespace, and no internal linebreaks (you might try 's' at the end to remedy the line break thing but no guarantees).

/^[-^!#$%&'*+\/=?`{|}~.\w]+@[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])*(\.[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])*)+$/
to php email perl regex address regular expression regexp rfc2822 by dasil003 on Fri Oct 28 20:31:07 GMT 2005 3 Comments

extract email addresses

<?php

function extract_emails_from($string){
  preg_match_all("/[\._a-zA-Z0-9-]+@[\._a-zA-Z0-9-]+/i", $string, $matches);
  return $matches[0];
}

$text = "blah blah blah [email protected] blah blah blah [email protected]";

$emails = extract_emails_from($text);

print(implode("\n", $emails));

?>


Context: http://forum.textdrive.com/viewtopic.php?pid=46783
to php email regex by tim on Fri Sep 09 22:52:16 GMT 2005 1 Comments

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