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：
<?php
class 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。