codeigniter多文件上傳使用示例

 這篇文章主要介紹了codeigniter多文件上傳使用示例,需要的朋友可以參考下

代碼如下: <?php if(!defined("BASEPATH")){ exit("No direct script access allowed"); }    /**   * Multi-Upload   *    * Extends CodeIgniters native Upload class to add support for multiple   * uploads.   *   * @package  CodeIgniter   * @subpackage Libraries   * @category Uploads   */   class MY_Upload extends CI_Upload {        /**     * Properties     */      protected $_multi_upload_data   = array();     protected $_multi_file_name_override = "";        /**     * Initialize preferences     *     * @access public     * @param array     * @return void     */     public function initialize($config = array()){      //Upload default settings.      $defaults = array(          "max_size"   => 0,          "max_width"   => 0,          "max_height"  => 0,          "max_filename"  => 0,          "allowed_types"  => "",          "file_temp"   => "",          "file_name"   => "",          "orig_name"   => "",          "file_type"   => "",          "file_size"   => "",          "file_ext"   => "",          "upload_path"  => "",          "overwrite"   => FALSE,          "encrypt_name"  => FALSE,          "is_image"   => FALSE,          "image_width"  => "",          "image_height"  => "",          "image_type"  => "",          "image_size_str" => "",          "error_msg"   => array(),          "mimes"    => array(),          "remove_spaces"  => TRUE,          "xss_clean"   => FALSE,          "temp_prefix"  => "temp_file_",          "client_name"  => ""         );        //Set each configuration.      foreach($defaults as $key => $val){       if(isset($config[$key])){        $method = "set_{$key}";        if(method_exists($this, $method)){         $this->$method($config[$key]);        } else {         $this->$key = $config[$key];        }       } else {        $this->$key = $val;       }      }        //Check if file_name was provided.      if(!empty($this->file_name)){       //Multiple file upload.       if(is_array($this->file_name)){        //Clear file name override.        $this->_file_name_override = "";          //Set multiple file name override.        $this->_multi_file_name_override = $this->file_name;       //Single file upload.       } else {        //Set file name override.        $this->_file_name_override = $this->file_name;          //Clear multiple file name override.        $this->_multi_file_name_override = "";       }      }     }        /**     * File MIME Type     *      * Detects the (actual) MIME type of the uploaded file, if possible.     * The input array is expected to be $_FILES[$field].     *      * In the case of multiple uploads, a optional second argument may be     * passed specifying which array element of the $_FILES[$field] array     * elements should be referenced (name, type, tmp_name, etc).     *     * @access protected     * @param $file array     * @param $count int     * @return void     */     protected function _file_mime_type($file, $count=0){      //Mutliple file?      if(is_array($file["name"])){       $tmp_name = $file["tmp_name"][$count];       $type = $file["type"][$count];      //Single file.      } else {       $tmp_name = $file["tmp_name"];       $type = $file["type"];      }        //We'll need this to validate the MIME info string (e.g. text/plain; charset=us-ascii).      $regexp = "/^([a-z-]+/[a-z0-9-.+]+)(;s.+)?$/";        /* Fileinfo Extension - most reliable method.       *        * Unfortunately, prior to PHP 5.3 - it's only available as a PECL extension and the       * more convenient FILEINFO_MIME_TYPE flag doesn't exist.       */        if(function_exists("finfo_file")){         $finfo = finfo_open(FILEINFO_MIME);        if(is_resource($finfo)){         $mime = @finfo_file($finfo, $tmp_name);         finfo_close($finfo);           /* According to the comments section of the PHP manual page,          * it is possible that this function returns an empty string          * for some files (e.g. if they don't exist in the magic MIME database).          */           if(is_string($mime) && preg_match($regexp, $mime, $matches)){            $this->file_type = $matches[1];           return;           }        }        }        /* This is an ugly hack, but UNIX-type systems provide a "native" way to detect the file type,       * which is still more secure than depending on the value of $_FILES[$field]['type'], and as it       * was reported in issue #750 (https://github.com/EllisLab/CodeIgniter/issues/750) - it's better       * than mime_content_type() as well, hence the attempts to try calling the command line with       * three different functions.       *       * Notes:       * - the DIRECTORY_SEPARATOR compari