Answers for "php leading zeros"

prepend 0 to number php

str_pad($month, 2, '0', STR_PAD_LEFT);

add zeros in front of number php

<?php
$num = 4;
$num_padded = sprintf("%02d", $num);
echo $num_padded; // returns 04
?>

php format int to 9 digits with preceding zeroes

str_pad($input, 9, "0", STR_PAD_LEFT);

format a number with leading zeros in php

sprintf('%06d', '12')