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Email validation with MX check

/ Published in: PHP
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found this somewhere online...not the author, but works like a charm

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  1. function checkEmail($email) {
  2.     if(preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/", $email)){
  3.         list($username,$domain)=split('@',$email);
  4.         if(!checkdnsrr($domain,'MX')) {
  5.             return false;
  6.         }
  7.         else {
  8.             return true;
  9.         }
  10.     }
  11. }

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