[PHP知识库]35. 搜索插入位置-PHP

其实就是二分查找

function searchInsert($nums, $target)
    {
        $left = 0;
        $right = count($nums)-1;

        while($left <=$right){
            $middle = intval(($right + $left )/2);

           
            if($target  ==  $nums[$middle]){
                //如果给定的可能重复加上这句
//                while(isset($nums[$middle -1]) && $nums[$middle-1] == $target ){
//                    $middle --;
//                }
                return $middle;
            }elseif($target < $nums[$middle]){
                $right = $middle-1;
            }else{
                $left = $middle+1;
            }
        }

        return $left;
    }