How to set member attribute methods in php class

The method of setting member attributes in the PHP class: first upload the path where the file is saved, and set the type that limits the uploaded file; then set the member attributes, and set the member attribute name; and finally set the value for the member attribute.

Methods for setting member attributes in the php class:

class FileUpload {
private $path = "./uploads"; //上传文件保存的路径
private $allowtype = array('jpg','gif','png'); //设置限制上传文件的类型
private $maxsize = 1000000; //限制文件上传大小（字节）
private $israndname = true; //设置是否随机重命名文件， false不随机
 
/**
* 用于设置成员属性（$path, $allowtype,$maxsize, $israndname）
* 可以通过连贯操作一次设置多个属性值
*@param string $key 成员属性名(不区分大小写)
*@param mixed $val 为成员属性设置的值
*@return object 返回自己对象$this，可以用于连贯操作
*/
function set($key, $val){
$key = strtolower($key);
if( array_key_exists( $key, get_class_vars(get_class($this) ) ) ){
$this->setOption($key, $val);
}
return $this;
}
 
/* 为单个成员属性设置值 */
private function setOption($key, $val) {
$this->$key = $val;
}
}

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