Zend Framework File Upload function Instance code

 zend Framework File Upload function instance code, PHP version 5.3.8,zend framework version 1.12, look at the following code, there are comments  

The code is as follows://instantiation of the upload class $upload = new Zend_file_transfer (); Set the filter to a size limit of 5 m, formatted as Jpg,gif,png $upload->addvalidator (' size ', FALSE, 5 * 1024 * 1024); $upload->addvalidator (' Extension ', false, ' jpg,gif,png '); if (! $upload->isvalid ()) {    print ' file size or format does not conform to ';     exit ();}  //Get uploaded file form with multiple items $fileInfo = $upload->getfileinfo (); Gets the suffix name, where pic is the name of the upload form file control         $ext = $this->getextension ($fileInfo [' pic '] [' name ']); Define the build directory $dir = './upload '. Date ('/y/m/d/'); File renames do {    $filename = date (' his '). Rand (100000, 999999). '.' . $ext; while (File_exists ($dir. $filename));  //If the directory does not exist create the directory $this->makedir ($dir); The file is formally written to the upload directory $upload->setdestination ($dir); $upload->addfilter (' Rename ', array (' Target ' => $filename, ' overwrite ' => true)); if (! $upload->receive ()) {    print ' upload image failed ';     exit ();}   print $filename;       Get file extension method:     Code as follows:/**  * Get the file name extension  *   * @param string $fileName  * @return string  */public function getextension ($file Name {    if (! $fileName) {        return ';    }     $exts = Explo De (".", $fileName);     $ext = end ($exts);     return $ext; }     How to create a directory:     code as follows:/**  * Create directory  *   * @param string $path  * @return Boo Lean  */Public Function MakeDir ($path) {    if (Directory_separator = = "") {//windows os     &N Bsp   $path = iconv (' utf-8 ', ' GBK ', $path);    }     if (! $path) {        return false;    }     if (fi Le_exists ($path)) {        return true;    }     if (mkdir ($path, 0777, True)) {         return true;    }     return false; }