PHP determines if a time period contains weekend code

There are two known time stamps. Determine if the timestamp is included in the Saturday Sunday.

/*** determine if there is a weekend in the time period. * @author * @version October 10, 2015 17:36:27* @param begin start Time * @param last end time */public function Isweek ($begin, $last) {    $ span = Intval ($last-$begin);    if ($span >= 604800) {    return 1;    } else if ($span > 0) {    $lWeek = date (' W ', $last);    $bWeek = Date (' W ', $begin);    if ($lWeek = = 6 | | $lWeek = = 0 | | $bWeek = = 6 | | $bWeek = = 0) {    return 1;    } else{    if ($bWeek > $lWeek) {    return 1;    } else{    return 0;}}}    

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