CodeIgniter multi-File Upload usage example

  This article mainly introduces the CodeIgniter multiple file upload use examples, need friends can refer to the following

The code is as follows: <?php if (!defined ("BasePath")) {exit ("No Direct script access Allowed");}    /**   * Multi-uploa D   *    * Extends codeigniters Native Upload class to add support for multiple   * uploads.   *   * @package  codeigniter   * @subpackage Libraries   * @category uploads  /  CL Ass My_upload extends Ci_upload {       /**     * Properties    /     protected $_multi_upload_data   = Array ();     Protected $_multi_file_name_override = "";        /**     * Initialize preferences     *     * @access public &nbsp ;   * @param array     * @return void    /    Public Function Initialize ($config = arr Ay ()) {     //upload default settings.       $defaults = Array (        & nbsp; " Max_size "  => 0,   &NBsp       "Max_width"   => 0,           "Max_height"  => 0,   &nbsp ;       "Max_filename"  => 0,           "allowed_types"  => "",           "file_temp"   => "",           "file_name"   => "", &N Bsp         "Orig_name"   => "",           "File_type"   => "", &NB Sp         "file_size"   => "",           "File_ext"   => "", &nbs P         "Upload_path"  => "",           "overwrite"   => FALSE,           "Encrypt_name"  => FALSE,           "is_image"   = > FALSE,           "image_width"  => "",           Image_heigh T "&NBsp;=> ",          " Image_type " =>" ",          " image_size _str "=>" "         " error_msg "  => Array (),    ,      " Mim Es "   => Array (),          " remove_spaces " => TRUE,       & nbsp   "Xss_clean"   => FALSE,           "Temp_prefix"  => "Temp_file_",   &NB Sp       "client_name"  => ""       ( );        //set each configuration.      foreach ($defaults as $key => $val) {      if (Isset ($config [$key])) {    &N Bsp   $method = "set_{$key}";        if (method_exists ($this, $method)) {        $this-> $method ($config [$ Key]);       &NBSP} else {        $this-> $key = $config[$key];              } else {        $this-> $key = $val;      }     &NBSP/       //check if file_name was provided.      if (!empty ($this->file_name)) {     //multiple file upload.       if ( Is_array ($this->file_name)) {       //clear file name override.         $this-& Gt;_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->_f Ile_name_override = $this->file_name;          //clear multiple file name override.         $this->_multi_file_name_override = ""; &nbSp    }           {       /**     * File MIME Type     *      * detects the (actual) MIME type of the uploaded file, if possible.     * The input array is expected to $_files[$field].     *      * In the case of multiple uploads, a optional second argument may being     * p Assed specifying which array element of the $_files[$field] array     * elements should be referenced (name, Typ E, Tmp_name, etc).     *     * @access protected     * @param $file array     * @param $count int &NB Sp   * @return void    /    protected function _file_mime_type ($file, $count =0) {    &N Bsp;//mutliple file?      if (Is_array ($file ["name"]) {      $tmp _name = $file ["Tmp_name"] [$count];   & nbsp   $type = $file ["type"] [$count];     &NBsp;//single file.     &NBSP} else {      $tmp _name = $file ["Tmp_name"];       $type = $file ["Type" ];     &NBSP}        //we ' ll need this to validate the MIME info string (e.g. Text/plain; char SET=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 extens Ion 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, $tmp _name); &n Bsp       Finfo_close ($finfo);          /* accordingTo the comments section of the PHP manual page,          * It's possible this function Retu RNs A empty string          * for some files (e.g. if they don ' t exist in the magic MIME Databas E.          */          if (is_string ($mime) && Preg_match ($reg Exp, $mime, $matches)) {            $this->file_type = $matches [1];       & nbsp   return;           {               }         /a ugly hack, but Unix-type systems provide a "native" way to detect the file type,       * whic H is still more secure than depending on the value of $_files[$field] [' type '], and as it       * Ed in issue #750 (https://github.com/EllisLab/CodeIgniter/issues/750)-it ' s better       * than Mime_conte Nt_Type () as OK, hence the attempts to try calling the command line with       * three different functions.       *       * Notes:       *-the Directory_separator comparison ensures t Hat we ' re not on a Windows system       *-Many system admins would disable the exec (), shell_exec (), Pope N () and similar functions       *   Due to security concerns, hence the function_exists () checks ;     *        if (directory_separator!== "") {        $cmd = "File--bri EF--mime ". Escapeshellarg ($tmp _name)." 2>&1 ";          if (function_exists ("exec")) {       /* might look confusing, a S $mime is being populated with the "output" when set in the second parameter.          * However, we only neeed the "last line", which is the actual return value of exec (), and As SucH-it overwrites          * anything that could already is set for $mime previously. This effectively makes the second parameter a dummy          * value which us to get the return status code.          */          $mime = @exec ($cmd, $mime, $return _status);          if ($return _status = 0 && is_string ($mime) && preg_match ($regexp, $mim E, $matches)) {          $this->file_type = $matches [1];           RE Turn           {       }        }         if ((bool) @ini_get ("safe_mode") = = FALSE && function_exists ("Shell_exec")) {        $mime = @ Shell_exec ($cmd);        if (strlen ($mime) > 0) {        $mime = explode ("n", Trim ($mIME));         if (Preg_match ($regexp, $mime [(Count ($mime)-1)], $matches)) {        &NBS p; $this->file_type = $matches [1];          return;        }       &nbsp,               if (function_ Exists ("Popen")) {        $proc = @popen ($cmd, "R");        if (Is_resource ($proc)) {        $mime = @fread ($proc, the same);         @pclose ($PROC);         if ($mime!== FALSE) {          $mime = explode ("n", Trim ($mime);       &NB Sp  if (Preg_match ($regexp, $mime [(Count ($mime)-1)], $matches)) {          $this->file_ Type = $matches [1];           return;         &NBSP,         {       }       &NBsp      //fall back to the deprecated mime_content_type (), if available (still better than $_files[$field] ["t Ype "]       if (function_exists (" Mime_content_type ")) {        $this->file_type = @ Mime_content_type ($tmp _name);        //it ' s possible that Mime_content_type () returns FALSE or a empty string.        if (strlen ($this->file_type) > 0) {        return;     &NBSP ; &NBSP}      }        //if all else fails, use $_files default MIME type.       $this->file_type = $type;    }        /**     * Set multiple Upload Data     *     * @a ccess protected     * @return void    /    protected function Set_multi_upload_data () {&N Bsp     $this->_multi_upload_data[] = Array (      "file_name" &nbsp => $this->file_name,       "File_type"   => $this->file_type,       "file_p Ath "  => $this->upload_path,      " Full_path "  => $this->upload_path. $this-> file_name,       "Raw_name"   => str_replace ($this->file_ext, "", $this->file_name),       "Orig_name"   => $this->orig_name,       "Client_name"  => $this->clie Nt_name       "File_ext"   => $this->file_ext,       "file_size"   => $t His->file_size       "Is_image"   => $this->is_image (),       "Image_width" & Nbsp;=> $this->image_width,       "Image_height"  => $this->image_height,       "Image_type"  => $this->image_type,       "Image_size_str" => $this->image_size_ STR      ); &nbsp          /**     * Get multiple Upload Data     *     * @access P Ublic     * @return array    /    public Function get_multi_upload_data () {     return $this->_multi_upload_data;    }        /**     * multile File Upload     *     * @access Public     * @param string     * @return mixed    /    Public Function Do_mult I_upload ($field) {     //is $_files[$field] set? If not, no reason to continue.      if (!isset ($_files[$field)) {return false;}        //is This really a multi Uploa D?      if (!is_array ($_files[$field] ["name"]) {     //fallback to Do_upload method.   & nbsp   Return $this->do_upload ($field);      }        //is the upload path valId?      IF (! $this->validate_upload_path ()) {     //errors'll already is set by Validate_u Pload_path () So just return false       return false;     &NBSP}        //every file would have a separate entry in each of the $_files Associativ e-array elements (name, type, etc).      //loop through $_files[$field] ["name"] as representative of total number of FILES. Use count as key in      //corresponding elements of the $_files[$field] elements.      for ($i =0 $i <count ($_files[$field] ["name"]) $i + +] {     //was The file able to is Uploaded? If not, determine the reason why.       if (!is_uploaded_file ($_files[$field] ["Tmp_name"] [$i])) {       //determine Error number.         $error = (!isset ($_files[$field] ["Error"] [$i])? 4: $_files[$field] ["Error"] [$i];          //set Error.        switch ($error) {       //upload_err_ini_size         C ASE 1:           $this->set_error ("Upload_file_exceeds_limit");         break;        //upload_err_form_size         Case 2:          $ This->set_error ("Upload_file_exceeds_form_limit");         break;        //upload_err_partial         Case 3:           $th Is->set_error ("upload_file_partial");         break;        //upload_err_no_file         Case 4:           $th Is->set_error ("upload_no_file_selected");         break;        //upload_err_no_tmp_dir         Case 6:           $this->sEt_error ("Upload_no_temp_directory");         break;        //upload_err_cant_write         Case 7:           $this->set_error ("Upload_unable_to_write_file");         break;        //upload_err_extension         Case 8:          $ This->set_error ("Upload_stopped_by_extension");         break;         default:        ->set_error   $this ("upload_no_file_selected");         break;       &NBSP}          //return failed upload.        return FALSE;      }        //set current file data as class variables.       $this->file_temp = $_files[$field] ["Tmp_name"] [$i];       $this->file_size = $_files[$field["Size"] [$i];       $this->_file_mime_type ($_files[$field], $i);       $this->file_type = preg_replace ("/^" (. +?);. *$/"," 1 ", $this->file_type);       $this->file_type = Strtolower (Trim (stripslashes ($this->file_type), ' "));       $this->file_name = $this->_prep_filename ($_files[$field] ["name"] [$i]);       $this->file_ext  = $this->get_extension ($this->file_name);       $this->client_name = $this->file_name;        //is The file type allowed to is uploaded?       if (! $this->is_allowed_filetype ()) {        $this->set_error ("Upload_ Invalid_filetype ");        return FALSE;      }        //if we ' re overriding, let's now make sure the new name and type are all Owed.      //check if a filename is supplied for the current file. OtherwIse, use it ' s given name.       if (!empty ($this->_multi_file_name_override[$i]) {        $this->file_ Name = $this->_prep_filename ($this->_multi_file_name_override[$i]);          //if no extension is provided in the File_name Config item and use the uploaded one.        if (Strpos ($this->_multi_file_name_override[$i], ".") = = FALSE) {      & nbsp $this->file_name. = $this->file_ext;        //an extension was provided, lets have it!       &NBSP} else {        $this->file_ext = $this->get_extension ($this->_mu lti_file_name_override[$i]);       &NBSP}          if (! $this->is_allowed_filetype (TRUE)) {    &N Bsp   $this->set_error ("Upload_invalid_filetype");         return FALSE;       &NBSP}      }        //convert The file size to kilobytes.       if ($this->file_size > 0) {        $this->file_size = round ($this->fil e_size/1024, 2);      }        //is The file size within the allowed maximum?       if (! $this->is_allowed_filesize ()) {        $this->set_error ("Upload_ Invalid_filesize ");        return FALSE;      }        //are the image dimensions within the allowed size?      //note:this can fail if the server has an open_basdir restriction.       if (! $this->is_allowed_dimensions ()) {        $this->set_error ("Upload_ Invalid_dimensions ");        return FALSE;      }        //sanitize the file name for security.       $this->file_name = $this->clean_file_namE ($this->file_name);        //truncate The file name if it ' s too long       if ($this->max_filename > 0 {        $this->file_name = $this->limit_filename_length ($this->file_name, $this-> Max_filename);      }        //remove spaces in the name       if ($this->rem Ove_spaces = = TRUE) {        $this->file_name = preg_replace ("/s+/", "_", $this->file_name); &nb Sp    }         * Validate the file name        * This function appends a n number onto the end of        * the ' file if one with the same name already exists.        * If it returns false there was a problem.        */        $this->orig_name = $this->file_name;        if ($this->overwrite = = FALSE) {    &nbsP   $this->file_name = $this->set_filename ($this->upload_path, $this->file_name);         if ($this->file_name = False) {         return FALSE;   &nbs P    }                /* Run the file through the XSS hacking filter &N Bsp      * This helps prevent malicious code from being        * embedded within a file.  scripts can easily        * is disguised as images or other file types.        */       if ($this->xss_clean) {        if ($this ;d O_xss_clean () = FALSE) {          $this->set_error ("Upload_unable_to_write_file");          return FALSE;        }       &nbsp,         * Move the file to the final Desti Nation     &NBSp  * to deal with different server configurations        * We'll attempt to use copy ().  if that fails        * We'll use Move_uploaded_file ().  one of the two should        * reliably work in most environments        */        IF (! @copy ($this->file_temp, $this->upload_path. $this->file_name)) {        if (! @move_uploaded_file ($this->file_temp, $this->upload_path. $this->file_name)) {          $this->set_error ("Upload_destination_error");          return FALSE;        }       &nbsp,         * Set the finalized image Dimensio NS        * This sets the image width/height (assuming the        * file is an IM Age).  we Use this information        * in the "Data" FUnction.        */        $this->set_image_properties ($this->upload_path. $this- >file_name);        //set current file data to Multi_file_upload_data.       $this->set_multi_upload_data ();     &NBSP}        //return all file upload data.      return TRUE;   &NBSP}  }