ค้นหาจำนวนวัน ตามวัน และ ระยะเวลาที่กำหนด

 <?php
function date_in_period($format, $start, $end, $skip = NULL){
    $output = array();
    $days = floor((strtotime($end) - strtotime($start))/86400);
    for($i=0;$i<=$days;$i++){
        $in_period = strtotime("+" . $i . " day", strtotime($start));
        if(is_array($skip) and in_array(date("D",$in_period), $skip)){
            continue;
        }
        array_push($output, date($format, $in_period));
    }
    return $output;
}
echo "No skipping : <br / >";
$date = date_in_period("D-d-m-Y", "2011-04-04", "2011-04-19");
foreach($date as $day){
    echo $day . "<br / >";
}
echo "Total : " . count($date) . " days<br / >";

echo "<br / ><br / >Has skipping : <br / >";
$date = date_in_period("D-d-m-Y", "2011-04-04", "2011-04-19", array("Mon", "Tue", "Wed", "Thu", "Fri"));
foreach($date as $day){
    echo $day . "<br / >";
}
echo "Total : " . count($date) . " days";
?>

ข้อมูลจากเว็บ thaicrate.com