PHP-精简一句if语句

Question

        if(in_array($file_ext, $ext_arr['image']))
        $file_path='uploads/image/'.$new_file_name;
        if(in_array($file_ext, $ext_arr['media']))
        $file_path='uploads/media/'.$new_file_name;
        if(in_array($file_ext, $ext_arr['file']))
        $file_path='uploads/file/'.$new_file_name;

Answer 1

方法一：

in_array($file_ext, $ext_arr['image']) && $file_path='uploads/image/'.$new_file_name;
in_array($file_ext, $ext_arr['media']) && $file_path='uploads/media/'.$new_file_name;
in_array($file_ext, $ext_arr['file']) && $file_path='uploads/file/'.$new_file_name;

方法二：

 foreach ($ext_arr AS $key => $value){
// in_array($file_ext, $value) && $file_path='uploads/'.$key.'/'.$new_file_name; 等同于下面if语句
if (in_array($file_ext, $value)){
$file_path='uploads/'.$key.'/'.$new_file_name;
}
}

Answer 2

把相关数据放到map中，如map.put("image","uploads/image/".$new_file_name)
然后在$file_path=map.get($file_ext)
这样可以不需要if