Average time in hours,minutes and seconds in php

Solution:

Close to Antony's solution, but with array ofhours given:

$time = array (
            '2452:43:44',
            '452:43:44',
            '242:43:44',
            '252:43:44',
            '2:43:44'
        );

$seconds = 0;
foreach($time as $hours) {
    $exp = explode(':', strval($hours));
    $seconds += $exp[0]*60*60 + $exp[1]*60 + $exp[2];
}

$average = $seconds/sizeof( $time );
echo floor($average/3600).':'.floor(($average%3600)/60).':'.($average%3600)%60;
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Solution:

$totalhourandmunite+=str_replace(":",'',$date);
strtoheur(round($totalhourandmunite/$nbdate,0));
function strtoheur($temp)
{
    if(strlen($temp)==1) return $temp;
    if(strlen($temp)==2)
        $temp=$temp."00";
    if(strlen($temp)==3)
        $temp="0".$temp;
    $temp=str_split($temp);
    $heure=$temp["0"].$temp["1"];
    $min=$temp["2"].$temp["3"];
    if($min/60>1)
    {
        $min=$min%60;
        $heure++;
    }
    if($min<10 && strlen($min)==1)
        $min="0".$min;
    if($heure>23)
    {
        $heure=$heure%24;
    }
    $temp=$heure.":".$min;
    return $temp;
}
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Solution:

1. The best way would be to change the total hour value in seconds.
2. Divide it by total count value. What you will get is average in seconds.
3. Convert average back in H:m:s format.