- substr: documentation ( source)
- filter_var: documentation ( source)
- print_r: documentation ( source)
<?php
$str = 'garahasgcdotrrriefvdqvegtartfhpnlwizanrhcqirnqllicyjhttvdylvkqccpljzrgledgqpjbttgwbqwgtkytkjxtufqcermdywzthceowyurrlmvvbiljraidwnmznazymwcjdozfaauzcnlwsxqfzgpzbsru1234567890ukxzqsvowzhnwnzzdzokhcffkpdvwycpcmxdknjvaakqjgjkvtqctpkhvgmeytsypkrfozeljsochfjvlszrwutiq';
// $str_array = explode('', $str);
$local = substr($str, 0, 64);
$domain = substr($str, 0, 63);
$com = substr($str, 0, 63);
$email = $local. '@' . $domain . '.' . $com;
print_r(filter_var($email , FILTER_VALIDATE_EMAIL) . "<br/>");