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run code in 300+ PHP versions simultaneously
<?php $amount = 799000; $number_sep = array(); $multi = 1; $exit = false; $i = 1000; for($j=3;$j < 15 ;$j=$j+2) { switch($j) { case 3: $temp = fmod($amount, $i); if($i < $amount) { if(!$temp) { $number_sep[] = $i; } else { $amount = $amount - $temp; $number_sep[] = round($temp,2); } } else { if(!$temp) { $number_sep[] = $i; } else { $number_sep[] = round($temp,2); } $exit = true; } break; case $j > 3 : $temp = $amount % $i; if($i < $amount) { if(!$temp) { $number_sep[] = $i; } else { $amount = $amount - $temp; $number_sep[] = substr($temp, 0, 2); } } else { if(!$temp) { $number_sep[] = $i; } else { $number_sep[] = $temp/$i; } $exit = true; }; break; } if($exit) { break; } $i = 10 * 10 * $i; } echo implode(',',array_reverse($number_sep));

preferences:
35.81 ms | 402 KiB | 5 Q