<?php
function credit($credit, $percent, $comis){
for($i=0; $depo>0;$i++){
$depo = (($credit*$percent + $comis) - 5000);
return $depo;
echo "прошло {$i} месяцев";
if($depo<0);
echo "прошло {$i} месяцев";
}
}
credit(40000, 1.04, 5000);
PD9waHAKIAogIGZ1bmN0aW9uIGNyZWRpdCgkY3JlZGl0LCAkcGVyY2VudCwgJGNvbWlzKXsKICAJZm9yKCRpPTA7ICRkZXBvPjA7JGkrKyl7CiAgCSRkZXBvID0gKCgkY3JlZGl0KiRwZXJjZW50ICsgJGNvbWlzKSAtIDUwMDApOyAKICAJCQogIAkJcmV0dXJuICRkZXBvOwogIAkJCWVjaG8gItC/0YDQvtGI0LvQviB7JGl9INC80LXRgdGP0YbQtdCyIjsKICAJCWlmKCRkZXBvPDApOwogIAkKICAJZWNobyAi0L/RgNC+0YjQu9C+IHskaX0g0LzQtdGB0Y/RhtC10LIiOwp9CiAgfQogIGNyZWRpdCg0MDAwMCwgMS4wNCwgNTAwMCk7