Is there a question about the Upload class in thinkphp3.2.3?

{Code ...} this class puts all the configurations in this array attribute during initialization. However, when reading the official documentation, I can set these configurations by calling class attributes, example: {code ...} I don't understand it here. this maxSize is only the config array...

Private $ config = array ('mimes '=> array (), // The MiMe type of the file that can be uploaded 'maxsize' => 0, // the size of the uploaded file is limited (0-No limit) 'exts' => array (), // The suffix of the file to be uploaded is 'autosub' => true, // the automatic subdirectory saves the file 'subname' => array ('date', 'Y-m-D'), // The subdirectory creation method, [0]-function name, [1]-parameter. multiple parameters use the array 'rootpath' => '. /Uploads/', // Save the root path 'savepath' => '', // Save the path 'savename' => array ('uniqid ',''), // upload file naming rule, [0]-function name, [1]-parameter, multiple parameters use array 'savext' => '', // Save the suffix of the file, if it is null, use the original suffix 'replace '=> false, // whether the same name overwrites 'hash' => true, // whether to generate the hash code 'callback' => false, // check whether a file callback exists. If an array of returned file information is 'driver '=> '', // The file Upload driver 'driverconfig' => array (), // Upload driver configuration); public function _ construct ($ config = array (), $ driver = '', $ driverConfig = null) {/* Get configuration */$ this-> config = array_merge ($ this-> config, $ config );}

This class puts all the configurations in this array attribute during initialization. However, when reading the official documentation, I can set these configurations by calling class attributes, for example:

$ Upload = new \ Think \ Upload (); // instantiate the upload class $ upload-> maxSize = 3145728; // Set the attachment Upload size

I don't understand it here. this maxSize is just a subscript in the config array attribute. it should be assigned a value like $ upload-> config ['maxsize, how can I assign values directly using attributes ??

Reply content:

Private $ config = array ('mimes '=> array (), // The MiMe type of the file that can be uploaded 'maxsize' => 0, // the size of the uploaded file is limited (0-No limit) 'exts' => array (), // The suffix of the file to be uploaded is 'autosub' => true, // the automatic subdirectory saves the file 'subname' => array ('date', 'Y-m-D'), // The subdirectory creation method, [0]-function name, [1]-parameter. multiple parameters use the array 'rootpath' => '. /Uploads/', // Save the root path 'savepath' => '', // Save the path 'savename' => array ('uniqid ',''), // upload file naming rule, [0]-function name, [1]-parameter, multiple parameters use array 'savext' => '', // Save the suffix of the file, if it is null, use the original suffix 'replace '=> false, // whether the same name overwrites 'hash' => true, // whether to generate the hash code 'callback' => false, // check whether a file callback exists. If an array of returned file information is 'driver '=> '', // The file Upload driver 'driverconfig' => array (), // Upload driver configuration); public function _ construct ($ config = array (), $ driver = '', $ driverConfig = null) {/* Get configuration */$ this-> config = array_merge ($ this-> config, $ config );}

This class puts all the configurations in this array attribute during initialization. However, when reading the official documentation, I can set these configurations by calling class attributes, for example:

$ Upload = new \ Think \ Upload (); // instantiate the upload class $ upload-> maxSize = 3145728; // Set the attachment Upload size

I don't understand it here. this maxSize is just a subscript in the config array attribute. it should be assigned a value like $ upload-> config ['maxsize, how can I assign values directly using attributes ??

Magic method _ set (): when assigning values to inaccessible properties, __set () is called.

Look at the _ set () method in the class...

/*** Use $ this-> name to obtain the configuration * @ param string $ name configuration name * @ return multitype configuration value */public function _ get ($ name) {return $ this-> config [$ name];} public function _ set ($ name, $ value) {if (isset ($ this-> config [$ name]) {$ this-> config [$ name] = $ value; if ('driverconfig' = $ name) {// reset the upload driver after changing the driver configuration // Note: You must change the driver configuration and then change the driver configuration $ this-> setDriver ();}}}

Look, these two magic methods re-implement class attribute access and operations;
In this way, the seemingly class attribute $ config is an array, but you can use these two magic methods to specify each element in the class attribute $ config as its own KEY as its class property name, VALUE is a class property VALUE.

If you do not rewrite the two magic methods, you may be able to understand them in another way:

/*** Default upload configuration * @ var array */$ mimes = array (); // The MiMe type of the file to be uploaded $ maxSize = 0; // the size of the uploaded file is limited (0-No limit) $ exts = array (); // the suffix of the file to be uploaded $ autoSub = true; // automatic subdirectory save file $ subName = array ('date', 'Y-m-D'); // subdirectory creation method, [0]-function name, [1]-parameter. multiple parameters use an array $ rootPath = '. /Uploads/'; // Save the root path $ savePath = ''; // Save the path $ saveName = array ('uniqid',''); // upload file naming rules, [0]-function name, [1]-parameter. multiple parameters use the array $ saveExt = ''; // Save the file suffix. if it is null, use the original suffix $ replace = false; // whether the same name overwrites $ hash = true; // whether to generate the hash code $ callback = false; // checks whether the file has a callback, if an array of returned file information $ driver = ''; // file Upload driver $ driverConfig = array (); // Upload driver configuration

It only involves the special attributes of the $ driverConfig class. This is not the scope of your issue.