PHP File Upload

<?PHP$allowtype=Array("GIF", "png", "JPG");//set the upload type to GIF, PNG, and JPG    $size= 1000000;//set the file size to 1M (1000000 bytes)    $path= "./uploads";//set the path to save files after uploading//determine if the file can be successfully uploaded to the server, $_files[' myfile ' [' Error '] is 0 for upload success    if($_files[' MyFile '] [' ERROR '] > 0) {              Echo' Upload error: '; Switch($_files[' MyFile '] [' Error ']) {              Case1: die(' Upload file size exceeds the agreed value in PHP config file: upload_max_filesize '));  Case2: die(' Upload file size exceeds the contract value in the form: Max_file_size '));  Case3: die(' files are only partially uploaded ');  Case4: die(' No files uploaded '); default: die(' Last known error '); }    }        //determine if the uploaded file is a file type that is not allowed, through the file's suffix name    $hz=Array_pop(Explode(".",$_files[' MyFile '] [' Name '])); //Determine whether a file is a file type that is allowed to be uploaded by judging the file suffix method    if(!In_array($hz,$allowtype)) {         die("This suffix is <b>{$hz}</b&gt, not a permitted file type! "); }        /*You can also restrict the type of file upload by obtaining the main type and subtype in the MIME type of the uploaded file list ($maintype, $subtype) =explode ("/", $_files[' myfile ' [' type ']); if ($maintype = = "text") {//The text file cannot be uploaded by the master type limit, such as. txt. html. PHP and other files die (' problem: cannot upload text files.    ‘); } */    //determine if the uploaded file is size    if($_files[' MyFile '] [' Size '] >$size ) {         die("More than a <b>{$size}</b> byte Size "); }        //For system security, also for files with the same name will not be overwritten, after uploading the file name using the system definition    $filename=Date("Ymdhis").Rand(100,999). ".".$hz; //determine whether to upload files    if(Is_uploaded_file($_files[' MyFile '] [' Tmp_name '])) {          if(!Move_uploaded_file($_files[' MyFile '] [' Tmp_name '],$path.‘ /‘.$filename)) {               die(' Problem: The file cannot be moved to the specified directory. ‘); }     }Else{         die("Problem: uploading a file {$_files[' MyFile '] [' Name ']} is not a legal document: "); }    //output If file upload is successful    EchoFile$upfileUploaded successfully, saved in directory {$path}, the size is {$_files[' MyFile '] [' Size ']} Bytes ";

PHP File Upload