PHP中的前导零

Question

I would like to present a list from 0 to 59 with the numbers 0 to 9 having a leading zero. This is my code, but it doesn't work so far. What is the solution?

for ($i=0; $i<60; $i++){
    if ($i< 10){      
        sprintf("%0d",$i);
    }
    array_push($this->minutes, $i);
}

Answer 1

Using %02d is much shorter and will pad the string only when necessary:

for($i=0; $i<60; $i++){
   array_push($this->minutes,sprintf("%02d",$i));
}