- implode: documentation ( source)
<?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);