PHP Implementation of Multiple Picture Upload Class Instance

This paper describes a practical PHP multi-picture file uploading class, which supports multi-picture uploading functions in gif, jpg, jpeg, pjpeg and png formats. The class can also limit picture types, upload picture sizes, set upload directories, and make some submission judgments. In addition, this class is not limited to uploading pictures, but also can upload TXT/RAR and other file types, but only needs to modify the code for 1 time, and interested readers can try it for themselves.

The complete function code of php multi-picture upload class is as follows:

<?php
class more_file_upload{
  const FILE_PATH = '/uploadfile/'; // The default file upload directory, please modify it yourself 
  var file_type;
  var file_type_array;
  var file_type_real_array;
  var file_type_string;
  var file_name;
  var file_size;
  var file_tmp_name;
  var file_error;
  var handledate;
  static totalsize = 0;
  function __construct(file_name, file_error, file_size, file_tmp_name, file_type){
    this -> handledate = date('m-d-Y');
    if (!empty(file_name)){
      this -> file_name = file_name;
      this -> file_error = file_error;
      this -> file_size = file_size;
      this -> file_tmp_name = file_tmp_name;
      this -> file_type = file_type;
      this -> file_type_array = array('/', 'image/gif', 'image/jpg', 'image/jpeg', 'image/pjpeg', 'image/png');
      this -> file_type_real_array = array(0.1, 'jpg' => 74707370, 'gif' => 7173, 'bmp' => 6677, 'png' => 807871);
      this -> show_execute_message(this -> file_error, this -> file_name, this -> file_type, this -> file_size);
      }
    }
  function __destruct(){
    this -> file_name = NULL;
    this -> file_error = NULL;
    this -> file_size = NULL;
    this -> file_tmp_name = NULL;
    this -> file_type = NULL;
    self :: totalsize = 0;
    }
  function show_execute_message(smfileerror, smfilename, smfiletype, smfilesize){
    if(smfileerror > 0){
      switch (smfileerror){
      case 1: smfilemessage = '<strong> The file exceeds the agreed size of the server! </strong>';
        break;
      case 2: smfilemessage = '<strong> File exceeds the specified file size! </strong>';
        break;
      case 3: smfilemessage = '<strong> Only part of the file was uploaded! </strong>';
        break;
      case 4: echo "this->file_name " . ' File upload failed! <br/>';
        break;
        }
      self :: __destruct();
      }else{
      smfiletypeflag = array_search(smfiletype, this -> file_type_array);
      //  Verify the true format 
      if(smfiletypeflag != false){
        file = fopen(this -> file_tmp_name, "rb");
        bin = fread(file, 10);
        fclose(file);
        strInfo = @unpack("c10chars", bin);
        typeCode = intval(strInfo['chars1'] . strInfo['chars2']);
        smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
        if(smfiletypeflag == false){ //  Determine whether it is png Picture 
          typeCode = intval(strInfo['chars2'] . strInfo['chars3'] . strInfo['chars4']);
          smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
          if(smfiletypeflag == false){ //  Determine whether it is jpg Picture 
            $typeCode = intval(strInfo['chars7'] . strInfo['chars8'] . strInfo['chars9'] . strInfo['chars10']);
            smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
            }
          }
        }
      if($smfiletypeflag == false){
        $smfilemessage = '<strong> The file type is wrong, please verify! </strong>';
        self :: __destruct();
        }else{
        $resflag = $this -> move_file($this -> file_tmp_name, this -> file_name);
        if (resflag == 1){
          $smfilemessage = ' File upload successful! ';
          self :: totalsize += intval($smfilesize);
          self :: __destruct();
          }else{
          $smfilemessage = '<strong> File upload failed! </strong>';
          self :: __destruct();
          }
        }
      }
    $smfilesizeformat = $this -> size_BKM(smfilesize);
    echo '<tr>
<td align="left" >' . smfilename . '</td>
<td align="center" >' . smfiletype . '</td>
<td align="center" >' . smfilesizeformat . '</td>
<td align="center" >' . smfilemessage . '</td>
</tr>';
    }
  function move_file(mvfiletmp, mvfilename){ //  Move a file 
    mvfilenamearr = explode('.', basename(mvfilename));
    mvfilenamearr[0] = this -> rand_string();
    mvfilename = implode('.', mvfilenamearr);
    if (is_uploaded_file(mvfiletmp)){
      uploadfile = self :: FILE_PATH . "mvfilename";
      result = move_uploaded_file(mvfiletmp, uploadfile);
      return result;
      }
    }
  function rand_string(){
    string = md5(uniqid(rand() . microtime()));
    return string;
    }
  function size_BKM(size){ // B/KB/MB Unit conversion 
    if(size < 1024)
    {
      size_BKM = (string)size . " B";
      }
    elseif(size < (1024 * 1024))
      {
      size_BKM = number_format((double)(size / 1024), 1) . " KB";
      }else
      {
      size_BKM = number_format((double)(size / (1024 * 1024)), 1) . " MB";
      }
    return size_BKM;
    }
  }
?>

Readers can copy the above code to the PHP file, and save the file name: more_upload_file. class. php, and include can be used.