闲来无事，整理了一下自己写的文件上传类。在PHP生涯中留下点记忆！！！
<php
class Upload {
/*
* Upload类 包含了文件上传、图片添加水印、图片截取、图片缩略
* author Ming
* date 2016-05-14 15:07
*/
//文件类型
public $type = array('gif','png','jpg','jpeg');
//文件命名
public $name;
//上传大小限制，单位B
public $max_size = 2048000;
//文件保存的目录
public $path;
//图片访问路径前缀
public $url_prefix = '';
//是否添加水印，wm_image和wm_text，只能选择其中的一种属性
//position int 水印位置安排（1-10）【1:左头顶；2:中间头顶；3:右头顶...值空:随机位置】
public $is_watermark = false;
//给图片添加水印图片，格式 array('image_url','position');
//例：array('../images/watermark.png','9')
public $wm_image;
//给图片添加水印文字，格式 array('text','fontsize','fontcolor','position');
//例：array('watermark','14','#CC0000','9');
public $wm_text;
//可以水印图片最小尺寸 array('width','height');
//例：array(200,200);
public $min_source_can_wm;
//是否生成缩略图 bool
public $is_thumb = false;
//缩略图的比例（10% 或者 100px）
public $thumb_ratio;
//是否截图 bool
public $is_screenshot = false;
//截图的数据 array('width'=>100,'height'=>100);
public $screenshot_ratio;
//提示说明
private $msg;
//图片后缀名
private $exten;
/*
* 功能介绍：上传文件方法
* return array 图片路径
*/
public function upload_file($FileName=''){
if(empty($FileName)){
foreach($_FILES as $value){
$file_local = $value['tmp_name'];
$this->exten = pathinfo($value['name'], PATHINFO_EXTENSION);//后缀名
$file_error = $value['error'];
$size = $value['size'];
}
}else{
$file_local = $_FILES[$FileName]['tmp_name'];
$this->exten = pathinfo($_FILES[$FileName]['name'], PATHINFO_EXTENSION);//后缀名
$file_error = $_FILES[$FileName]['error'];
$size = $_FILES[$FileName]['size'];
}
//检查保存文件的目录是否存在
if(!$this->dirfn()){
$this->err_code = 1;
return false;
}
//检查该后缀名是否允许上传
if(!in_array($this->exten, $this->type, true)){
$this->err_code = 2;
return false;
}
//检查该图片的大小
if($this->max_size < $size){
$this->err_code = 3;
return false;
}
//文件保存路径
if(empty($this->name)){
$this->name = time().mt_rand(1000,9999);
}
$url = $this->path . $this->name . '.' . $this->exten;
//保存
$result = move_uploaded_file($file_local, $url);
if($result && $file_error==0){
chmod($url, 0777);
$data = array();
//是否生成缩略图片
if($this->is_thumb){
$data['thumb'] = $this->set_thumb($url);//缩略图路径
}
//是否需要截图
if($this->is_screenshot){
$data['screenshot'] = $this->set_screenshot($url);//截图路径
}
//是否添加水印
if($this->is_watermark){
if(!$this->watermarkfn($url)){
$this->err_code = 11;
return false;
}
}
$data['image'] = $this->urlfn($url);//原图路径
return $data;
}else{
switch ($file_error){
case 1:
$this->msg = '文件大小超出了服务器的空间大小';
break;
case 2:
$this->msg = '要上传的文件大小超出浏览器限制';
break;
case 3:
$this->msg = '文件仅部分被上传';
break;
case 4:
$this->msg = '没有找到要上传的文件';
break;
case 5:
$this->msg = '服务器临时文件夹丢失';
break;
case 6:
$this->msg = '文件写入到临时文件夹出错';
break;
}
$this->err_code = 4;
return false;
}
}
/*
* 功能介绍：读取图片信息
* return 图片资源
*/
private function get_image_info($url, $exten=''){
$exten = empty($exten) $this->exten : $exten;
//获取图片宽高
list($width, $height) = getimagesize($url);
//创建画布
switch($exten){
case 'jpg':
case 'jpeg':
$source = @imagecreatefromjpeg($url);
break;
case 'png':
$source = @imagecreatefrompng($url);
imagesavealpha($source,true);
break;
case 'gif':
$source = @imagecreatefromgif($url);
break;
default:
$this->msg = '不能创建画布';
$this->err_code = 6;
return false;
}
return array(
'width' => $width,
'height' => $height,
'source' => $source,
);
}
/*
* 功能介绍：生成缩略图
* return 图片路径
*/
private function set_thumb($url){
//资源信息
$info = $this->get_image_info($url);
if(empty($this->thumb_ratio)){
$this->err_code = 6;
return false;
}
if(stripos($this->thumb_ratio, '%')){
$multiple = (float)$this->thumb_ratio; //比例
$new_width = $info['width'] * $multiple; //缩略图的宽度
$new_height = $info['height'] * $multiple; //缩略图的高度
}else if(stripos($this->thumb_ratio, 'px')){
$new_width = (int)$this->thumb_ratio; //缩略图的宽度
$new_height = $new_width * $info['height'] / $info['width']; //缩略图的高度
}
//新建彩色图像
$thumb = imageCreateTrueColor($new_width, $new_height);
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
@imagecopyresized($thumb, $info['source'], 0, 0, 0, 0, $new_width, $new_height, $info['width'], $info['height']);
//缩略图url
$url_info = pathinfo($url);
$this->path = $url_info['dirname'].'/s/';
$s_name = $url_info['basename'];
$s_url = $this->path . $s_name;//缩略图的路径
if($this->dirfn()){
$this->keep_image_info($thumb, $s_url);
return $this->urlfn($url);
}else{
$this->err_code = 9;
return false;
}
}
/*
* 功能介绍：截图
* return 图片路径
*/
private function set_screenshot($url){
//资源信息
$info = $this->get_image_info($url);
if(empty($this->screenshot_ratio) || !is_array($this->screenshot_ratio)){
$this->err_code = 8;
return false;
}
$size = $this->screenshot_ratio;
//宽度截图规则：谁小就取谁
if($size['width'] <= $info['width']){
$new_width = $size['width'];
$start_width = ($info['width'] - $size['width']) / 2; //开始截图的宽度
}else{
$new_width = $info['width'];
$start_width = 0;
}
//高度截图规则：谁小就取谁
if($size['height'] <= $info['height']){
$new_height = $size['height'];
$start_height = ($info['height'] - $size['height']) / 2; //开始截图的高度
}else{
$new_height = $info['height'];
$start_height = 0;
}
//新建彩色图像
$screenshot = imageCreateTrueColor($new_width, $new_height);
imagealphablending($screenshot, false);
imagesavealpha($screenshot, true);
@imagecopyresized($screenshot, $info['source'], 0, 0, $start_width, $start_height, $new_width, $new_height, $new_width, $new_height);
//截图url
$url_info = pathinfo($url);
$this->path = $url_info['dirname'].'/c/';
$c_name = $url_info['basename'];
$c_url = $this->path . $c_name;//截图的路径
if($this->dirfn()){
$this->keep_image_info($screenshot, $c_url);
return $this->urlfn($url);
}else{
$this->err_code = 10;
return false;
}
}
/*
* 功能介绍：添加水印
*/
public function watermarkfn($url){
//默认
$this->w_pct = 70; //透明度
$position = 9; //位置
$min_size = array(200,200);
if(!$this->check($url)) return false;
//设置范围：少于最小尺寸就不添加水印
if(!empty($this->min_source_can_wm)){
$min_size = $this->min_source_can_wm;
}
//原图资源信息
$source_info = getimagesize($url);//图片信息
$source_w = $source_info[0];//图片宽度
$source_h = $source_info[1];//图片高度
//尺寸少于最小尺寸，不添加水印
if($source_w < $min_size[0] || $source_h < $min_size[1]) return true;
switch($source_info[2]) { //图片类型
case 1 : //GIF格式
$source_img = imagecreatefromgif($url);
break;
case 2 : //JPG格式
$source_img = imagecreatefromjpeg($url);
break;
case 3 : //PNG格式
$source_img = imagecreatefrompng($url);
imagesavealpha($source_img,true);
break;
default :
return false;
}
//水印图片
if(!empty($this->wm_image)){
$ifwaterimage = 1; //标记
$water_img = $this->wm_image;
$w_img = $water_img[0];
//检查水印图片是否有效
if(!empty($w_img) && file_exists($w_img)){
//水印图片资源信息
$water_info = getimagesize($w_img);
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2]) {
case 1 :
$wm_source = imagecreatefromgif($w_img);
break;
case 2 :
$wm_source = imagecreatefromjpeg($w_img);
break;
case 3 :
$wm_source = imagecreatefrompng($w_img);
imagealphablending($w_img,false);
imagesavealpha($w_img,true);
break;
default :
return;
}
$position = empty($water_img[1]) $position : $water_img[1];
}else{
$this->err_code = 13;
return false;
}
//水印文字
}else if(!empty($this->wm_text)){
$ifwaterimage = 0;
$text_info = $this->wm_text;
$w_text = empty($text_info[0]) 'watermark' : $text_info[0];
$w_font = empty($text_info[1]) 14 : $text_info[1];
$w_color = empty($text_info[2]) '#CC0000' : $text_info[2];
$position = empty($text_info[3]) $position : $text_info[3];
$temp = imagettfbbox(ceil($w_font*2.5), 0, './includes/texb.ttf', $w_text); //imagettfbbox返回一个含有 8 个单元的数组表示了文本外框的四个角
$width = $temp[2] - $temp[6];
$height = $temp[3] - $temp[7];
unset($temp);
}else{
$this->err_code = 12;
return false;
}
switch($position) {
case 1:
$wx = 5;
$wy = 5;
break;
case 2:
$wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3:
$wx = $source_w - $width;
$wy = 0;
break;
case 4:
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5:
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6:
$wx = $source_w - $width;
$wy = ($source_h - $height) / 2;
break;
case 7:
$wx = 0;
$wy = $source_h - $height;
break;
case 8:
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 9:
$wx = $source_w - ($width+5);
$wy = $source_h - ($height+5);
break;
case 10:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
default:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
}
if($ifwaterimage){
if($water_info[2] == 3){ //PNG格式
imagecopy($source_img, $wm_source, $wx, $wy, 0, 0, $width, $height);
}else{
imagecopymerge($source_img, $wm_source, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
}
}else{
if(!empty($w_color) && (strlen($w_color)==7)) {
$r = hexdec(substr($w_color,1,2));
$g = hexdec(substr($w_color,3,2));
$b = hexdec(substr($w_color,5));
}else{
return;
}
imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));
}
//输出图片
switch($source_info[2]) {
case 1 :
imagegif($source_img, $url);
break;
case 2 :
imagejpeg($source_img, $url, 80);
break;
case 3 :
imagepng($source_img, $url);
break;
default :
return;
}
if(isset($wm_source)) {
imagedestroy($wm_source);
}
imagedestroy($source_img);
return true;
}
/*鉴定图片信息*/
public function check($image){
return extension_loaded('gd') && preg_match("/\.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' 'jpeg' : $m[1]));
}
/*
* 功能介绍：保存处理后的图片
*/
private function keep_image_info($image_source, $url, $exten=''){
$exten = empty($exten) $this->exten : $exten;
switch($exten){
case 'jpg':
case 'jpeg':
imagejpeg($image_source, $url, 80);
break;
case 'png':
imagepng($image_source, $url, 8);
break;
case 'gif':
imagegif($image_source, $url, 100);
break;
}
//释放资源
imagedestroy($image_source);
return;
}
/*
* 功能介绍：检查是否存在目录，如果不存在就创建该目录
* $dir string 目录
* return true or false
*/
private function dirfn(){
$dir = rtrim($this->path, '/').'/';
if(!file_exists($dir)){
mkdir($dir,0777,true);
chmod($dir,0777);
}
return is_dir($dir);
}
/*
* 功能介绍：路径处理
* $url string 路径
* return string
*/
private function urlfn($url){
if(empty($this->url_prefix)){
return $url;
}else{
return $this->url_prefix . ltrim($url, '../');
}
}
/*
* 功能介绍：错误返回
* return string
*/
public function get_error(){
if(!$this->err_code) return false;
$err_msg = array(
'0' => $this->msg,
'1' => $this->path.'目录不存在&创建目录失败，请检查目录权限',
'2' => '文件类型不符合，允许上传的文件后缀是：'.implode('、',$this->type),
'3' => '文件大小不符：只允许上传少于2M的图片',
'4' => '上传失败，原因是：'.$this->msg,
'5' => '上传文件失败',
'6' => '图片损坏了'.$this->msg,
'7' => '请配置好缩略图与原图的比例',
'8' => '请配置好截取图片的尺寸',
'9' => '缩略图目录不存在&创建目录失败，请检查目录权限',
'10' => '截图目录不存在&创建目录失败，请检查目录权限',
'11' => '添加水印失败',
'12' => '请设置好添加水印的参数',
'13' => '水印图片无效，请重新设置或检查水印图片路径',
);
return $err_msg[$this->err_code];
}
}
>
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