很好的利用了php 自带的数组排序函数:
function findMedianSortedArrays($nums1, $nums2) {
$num = array_merge($nums1, $nums2);
sort($num);
$count = count($num);
$half = intval($count/2);
if($count%2 == 0){
$median = ($num[$half-1]+$num[$half])/2;
}else{
$median = $num[$half];
}
return $median;
}