Creare array calcolando differenza temporale in ore da un array con elenco datetime

[badaze]

Cosi allora ?

<?php
function conta_ore($start, $end) { 
    return "diff $start - $end
";
}

   $A[0] = "2013-08-18 08:30:00";
   $A[1] = "2013-08-18 10:30:00";
   $A[2] = "2013-08-18 17:30:00";
   $A[3] = "2013-08-19 08:40:00";

$j = count($A) - 2;
$ris = array();
for ($i=0;$i<=$j;$i++) {
    $ris[] = conta_ore($A[$i],$A[$i+1]);
}

print_r($ris);
?>