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<?php $amount = 12302342340; $number_sep = array(); $multi = 1; $exit = false; for($i = 10,$j=1;$i < 9 ; $i * 10 * $multi,$j=$j+2) { switch($j) { case 3: $temp = $amount % $i; if($i < $amount) { if(!$temp) { $number_sep[] = $i; } else { $amount = $amount - $temp; $number_sep[] = $temp; } } else { if(!$temp) { $number_sep[] = $i; } else { $number_sep[] = $temp; } $exit = true; } break; case $j > 3 : $temp = $amount % $i; if($i < $amount) { if(!$temp) { $number_sep[] = $i; } else { $amount = $amount - $temp; $number_sep[] = $temp; } } else { if(!$temp) { $number_sep[] = $i; } else { $number_sep[] = $temp; } $exit = true; }; break; } if($exit) { break; } $multi = 10 * 10 * $i; } echo implode(',',$number_sep);

preferences:
82.9 ms | 402 KiB | 5 Q