function PrintStringEqualParts($str, $parts) {
$length = strlen($str);
if ($length % $parts != 0) {
echo "No equal parts";
return;
}
$part_size = (int)($length / $parts);
for ($i = 0; $i < $length; $i++) {
if ($i % $part_size == 0 && $i != 0) {
echo "\n";
}
echo $str[$i];
}
}
$str = "php c++ c java python c#";
$parts = 4;
PrintStringEqualParts($str, $parts);
/*
run:
php c+
+ c ja
va pyt
hon c#
*/