本文所述为一个实用的PHP多图片文件上传类，其支持gif、jpg、jpeg、pjpeg、png格式的多图片上传功能，类中还可限制图片类型、上传图片的大小、设置上传目录、一些提交判断等功能。此外该类并不局限于图片的上传，也可以上传TXT/RAR等文件类型，只是需要对代码进行一下修改，感兴趣的读者可以自己尝试一下。
php多图片上传类完整功能代码如下：
<?phpclass more_file_upload{ const FILE_PATH = '/uploadfile/'; //默认文件上传的目录，请自行修改 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>文件超过服务器的约定大小！</strong>'; break; case 2: smfilemessage = '<strong>文件超过指定的文件大小！</strong>'; break; case 3: smfilemessage = '<strong>文件只上传了部分！</strong>'; break; case 4: echo "this->file_name " . '文件上传失败！<br/>'; break; } self :: __destruct(); }else{ smfiletypeflag = array_search(smfiletype, this -> file_type_array); // 进行真实格式验证 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){ // 判断是否是png图片 typeCode = intval(strInfo['chars2'] . strInfo['chars3'] . strInfo['chars4']); smfiletypeflag = array_search(typeCode, this -> file_type_real_array); if(smfiletypeflag == false){ // 判断是否是jpg图片 $typeCode = intval(strInfo['chars7'] . strInfo['chars8'] . strInfo['chars9'] . strInfo['chars10']); smfiletypeflag = array_search(typeCode, this -> file_type_real_array); } } } if($smfiletypeflag == false){ $smfilemessage = '<strong>文件类型不对，请核实！</strong>'; self :: __destruct(); }else{ $resflag = $this -> move_file($this -> file_tmp_name, this -> file_name); if (resflag == 1){ $smfilemessage = '文件上传成功！'; self :: totalsize += intval($smfilesize); self :: __destruct(); }else{ $smfilemessage = '<strong>文件上传失败！</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){ // 移动文件 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单位转换 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; } }?> 读者可以将上述代码复制到PHP文件中，并保存文件名为：more_upload_file.class.php，在使用时include该文件即可。
