Convert seconds to hours : minutes : seconds

seconds_to_time.php

<?php 

function seconds_to_time($seconds)
{
    $normalized = (int) ($seconds ?? 0);

    if ($normalized === 0) {
        return '00:00:00';
    }

    if ($normalized >= 86400) {
        $hours = floor($normalized / 3600);
        $minutes = ($normalized / 60) % 60;
        $seconds = $normalized % 60;

        $hours = str_pad($hours, 2, '0', STR_PAD_LEFT);
        $minutes = str_pad($minutes, 2, '0', STR_PAD_LEFT);
        $seconds = str_pad($seconds, 2, '0', STR_PAD_LEFT);

        return $hours.':'.$minutes.':'.$seconds;
    }

    return gmdate('H:i:s', $normalized);
}

// seconds_to_time(1) -- 00:00:01
// seconds_to_time(60) -- 00:01:00
// seconds_to_time(3600) -- 01:00:00
// seconds_to_time(86400) -- 24:00:00
// seconds_to_time(86401) -- 24:00:01
// seconds_to_time(86460) -- 24:01:00
// seconds_to_time(87000) -- 24:10:00