Median.php

<?php

$a = array(1=>1,3,5,5,7,2,6,4,2,2,7,9,10);

$median =0;

for($i=1;$i<=10;$i++){
    for($j=$i+1;$j<=count($a);$j++){
        if($a[$i]>$a[$j]){
            $a[$i] = $a[$i]+$a[$j];
            $a[$j] = $a[$i]-$a[$j];
            $a[$i] = $a[$i]-$a[$j];
        }
    }
}

if(count($a)%2==0){
    $median = ($a[count($a)/2]+$a[count($a)/2+1])/2;
}else{
    $median = $a[count($a)+1/2]/2;
}


echo $median;

?>