Validation of email in php

Validation of email address in php

function is_valid_email($email) {
  $result = TRUE; 

if(!eregi 

("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $email))

  {
    $result = FALSE;
  }
  return $result;
}

Use this function and pass the email address which you get from the your field....

:)