Formatting a number with leading zeros in PHP [duplicate]

Answer 1

You can always abuse type juggling:

function zpad(int $value, int $pad): string {
    return substr(1, $value + 10 ** $pad);
}

This wont work as expected if either 10 ** pad > INT_MAX or value >= 10 * pad.

Answer 2

This works perfectly:

$number = 13246;
echo sprintf( '%08d', $number );

Answer 3

echo str_pad("1234567", 8, '0', STR_PAD_LEFT);

Answer 4

I wrote this simple function to produce this format: 01:00:03

Seconds are always shown (even if zero). Minutes are shown if greater than zero or if hours or days are required. Hours are shown if greater than zero or if days are required. Days are shown if greater than zero.

function formatSeconds($secs) {
    $result = '';

    $seconds = intval($secs) % 60;
    $minutes = (intval($secs) / 60) % 60;
    $hours = (intval($secs) / 3600) % 24;
    $days = intval(intval($secs) / (3600*24));

    if ($days > 0) {
        $result = str_pad($days, 2, '0', STR_PAD_LEFT) . ':';
    } 

    if(($hours > 0) || ($result!="")) {
        $result .= str_pad($hours, 2, '0', STR_PAD_LEFT) . ':';
    } 

    if (($minutes > 0) || ($result!="")) {
        $result .= str_pad($minutes, 2, '0', STR_PAD_LEFT) . ':';
    } 

    //seconds aways shown
    $result .= str_pad($seconds, 2, '0', STR_PAD_LEFT); 

    return $result;

} //funct

Examples:

echo formatSeconds(15); //15
echo formatSeconds(100); //01:40
echo formatSeconds(10800); //03:00:00 (mins shown even if zero)
echo formatSeconds(10000000); //115:17:46:40 

Answer 5

sprintf is what you need.

EDIT (somehow requested by the downvotes), from the page linked above, here's a sample "zero-padded integers":

<?php
    $isodate = sprintf("%04d-%02d-%02d", $year, $month, $day);
?>

Answer 6

Though I'm not really sure what you want to do you are probably looking for sprintf.

This would be:

$value = sprintf( '%08d', 1234567 );