<?php
$str = "970122";
for( $i = 0; $i <= strlen( $str ); $i++ ) { echo substr( $str, $i, 1 ) . "\n"; }
?>
PD9waHAKJHN0ciA9ICI5NzAxMjIiOwpmb3IoICRpID0gMDsgJGkgPD0gc3RybGVuKCAkc3RyICk7ICRpKysgKSB7CgllY2hvIHN1YnN0ciggJHN0ciwgJGksIDEgKSAuICJcbiI7Cn0KPz4=