Remove invalid email format in PHP

Question

Array (
    [0] => [email protected]
    [1] => [email protected]
    [2] => invalidEmail.com
)

Notice that the third array value is invalid email format. How do I remove it by using/creating a function? I need the valid email to implode("," the valid email) before sending an email using the mail() function.

Answer 1

$valid = array_filter($emails, create_function('$s', 'return filter_var($s, FILTER_VALIDATE_EMAIL);'));

Or for PHP 5.3+:

$valid = array_filter($emails, function ($s) { return filter_var($s, FILTER_VALIDATE_EMAIL); });

Answer 2

<?php
$len=count($array);
for ($i=0;$i<$len;$i++)
  if (preg_match('^[a-z0-9!#$%&*+/=?^_`{|}~-]+(?:.[a-z0-9!#$%&*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?.)+(?:[a-z]{2,4}|museum|travel)$/i',$array[$i]))
      echo $array[$i];
?>