如何通过在php中操作两个数组来获取信息？

I have two array one for present list and other for total lectures. i want a third array that will hold the percent of two

My first array (present days list)

$allpresentAttInfo = array(
        0 => array(
           'year' => '2013',
           'term' => 'T1',
           'presentDays' => '123' 
        ),
        1 => array(
           'year' => '2013',
           'term' => 'T2',
           'presentDays' => '112'
        )
    );

My Second array (Total days list)

$allAttInfo = array(
        0 => array(
           'year' => '2013',
           'term' => 'T1',
           'totalDays' => '200' 
        ),
        1 => array(
           'year' => '2013',
           'term' => 'T2',
           'totalDays' => '216'
        )
    );

My Resultant array should be like this

 $attInfo = array(
        0 => array(
            'year' => '2013',
            'term' => 'T1',
            'presentPercent' => '63.7 %'
        ),
        1 => array(
            'year' => '2013',
            'term' => 'T2',
            'presentPercent' => '42.7 %'
        )
    );

So by merging both the arrays i will have to find the present present in given year and term. How to achieve this on PHP side. Thanks in advance

Well thanks guys .. I was in a hurry so searching for some short-cut copy paste way ... Well i coded it. but still give me some performance optimization if available.

My Solution is.

$attInfo = array();
    foreach ($allAttInfo as $allatt) {
        foreach ($allpresentAttInfo as $allpre) {
                if($allpre['year'] == $allatt['year'] && $allpre['term'] == $allatt['term']){
                   $presentPercent = round(($allpre['presentDays'] / $allatt['totalDay'])*100,2) . "%";
                   $newArray=array('year'=>$allpre['year'],'term'=>$allpre['term'],'presentPercent'=>$presentPercent);
                   array_push($attInfo, $newArray);
            }
        }
    }