php图片上传类,支持加水印,生成略缩图
发布:smiling 来源: PHP粉丝网 添加日期:2014-09-05 09:24:41 浏览: 评论:0
分享一个网友写的php图片上传类,支持加水印,生成略缩图功能,里面是配置和可以获取的一些信息,每一个配置信息都有默认值,如无特殊需要,可以不配置,PHP类代码如下:
- <?php
- /*----------------------------------------------------------------------------------
- *
- *----------------------------------------------------------------------------------
- */
- class image_up{
- //定义基本参数
- private $uptype=array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png'); //上传文件类型
- private $max_file_size=102400; //上传大小限制(单位:KB)
- private $destination_folder="up/"; //上传文件路径
- private $watermark=1; //是否附加水印
- private $watertype=1; //水印类型(1为文字,2为图片)
- private $waterposition=1; //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);
- private $waterstring=null; //水印字符串
- private $waterimg=null; //水印图片
- private $imgpreview=1; //是否生成预览图(1为生成,其他为不生成);
- private $imgpreviewsize=1; //预览图比例,0为按固定宽和高显示,其他为比例显示
- private $imgwidth=200; //预览图固定宽度
- private $imgheight=200; //预览图固定高度
- //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- private $imgthu=1; //是否生成且保存略缩图,1为生成,0为不生成
- private $imgthu_folder=null; //略缩图保存路径,默认与文件路径一致
- private $imgthu_fixed=0; //略缩图是否使用固定宽高,1为使用,0为灵活变动
- private $imgthu_width=200; //略缩图宽度
- private $imgthu_height=200; //略缩图高度
- private $imgthu_name=null; //略缩图名称
- //******************************************************************************************************************
- private $inputname="upfile"; //文件上传框名称
- //******************************************************************************************************************
- private $img_preview_display; //图片预览图显示
- //******************************************************************************************************************
- //文件上传相关信息,1为文件不存在,2为类型不符合,3为超出大小限制,4为上传失败,0为上传成功
- private $file_up_info=null;
- //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- //可在外部获取上传文件基本信息
- private $file_name; //客服端文件的原名称
- private $file_type; //文件的MIME类型
- private $file_size; //已上传文件的大小,单位/字节
- private $file_tmp_name; //储存的临时文件名
- private $file_error; //该文件上传相关错误代码
- private $img_size; //取得图片的长宽
- private $file_basename; //获取带扩展名的全名
- private $file_extension; //获取文件扩展名
- private $filename; //文件名(不带扩展名)
- private $destination; //问价路径加名称
- //******************************************************************************************************************
- public function __set($propety_name,$value){
- $this->$propety_name=$value;
- }
- public function __get($property_name){
- if(isset($this->$property_name))
- return($this->$property_name);
- else return(NULL);
- }
- //******************************************************************************************************************
- //定义文件上传功能
- public function up(){
- //判断文件是否存在
- if(!is_uploaded_file($_FILES[$this->inputname]["tmp_name"])){
- $this->file_up_info=1;
- return;
- }
- //获取并赋值相应基本参数
- $upfile=$_FILES[$this->inputname];
- $this->file_name=$upfile["name"];
- $this->file_type=$upfile["type"];
- $this->file_size=$upfile["size"];
- $this->file_tmp_name=$upfile["tmp_name"];
- $this->file_error=$upfile["error"];
- //检查文件类型是否符合
- if(!in_array($this->file_type,$this->uptype)){
- $this->file_up_info=2;
- return;
- }
- //检查文件大小是否超出限制
- if($this->file_size>$this->max_file_size){
- $this->file_up_info=3;
- return;
- }
- //判断目录是否存在
- if(!file_exists($this->destination_folder))
- mkdir($this->destination_folder);
- //进一步取得图片的信息并赋值
- $this->img_size=getimagesize($this->file_tmp_name);
- $pathinfo=pathinfo($this->file_name);
- $this->file_extension=$pathinfo["extension"]; //获取文件扩展名
- $this->file_basename=$pathinfo["basename"]; //获取带扩展名的全名
- $this->filename=$pathinfo["filename"]; //文件名(不带扩展名)
- $filename2=$pathinfo['filename'];
- $this->destination = $this->destination_folder.$this->filename.".".$this->file_extension;
- //判断文件名是否存在,如果存在则重命名
- $n=1;
- while (file_exists($this->destination)){
- while (file_exists($this->destination)){
- $n++;
- $this->filename=$this->filename."(".$n.")";
- $this->destination = $this->destination_folder.$this->filename.".".$this->file_extension;
- }
- $this->filename=$filename2."(".$n.")";
- $this->destination = $this->destination_folder.$this->filename.".".$this->file_extension;
- }
- //移动上传的文件
- if(move_uploaded_file($this->file_tmp_name,$this->destination))
- $this->file_up_info=0;
- else $this->file_up_info=4;
- //添加水印
- if($this->watermark==1){
- $this->imgthu();
- }
- //生成略缩图
- if($this->imgthu==1){
- $this->add_watermark();
- }
- //生成预览图
- if($this->imgpreviewsize == 0){
- if($this->img_size["0"]<$this->imgwidth) $this->imgwidth=$this->img_size["0"];
- if($this->img_size["1"]<$this->imgheight) $this->imgheight=$this->img_size["1"];
- }else{
- $this->imgwidth=$this->img_size["0"]*$this->imgpreviewsize;
- $this->imgheight=$this->img_size["1"]*$this->imgpreviewsize;
- }
- $this->img_preview_display="<img src='$this->destination' width='$this->imgwidth' height='$this->imgheight'
- alt='图片预览:r文件名':$this->file_tmp_name />";
- }
- //====================================================================================================================
- //====================================================================================================================
- //生成略缩图功能
- function imgthu(){
- if($this->imgthu_folder==null)
- $this->imgthu_folder=$this->destination_folder;
- //$this->imgthu_name=$this->filename."_t.".$this->file_extension;
- $imgthu_name_b=$this->filename."_t";
- $imgthu_name_b2=$this->filename."_t";
- $destination_b=$this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
- //判断文件名是否存在,如果存在则重命名
- $n=1;
- while (file_exists($destination_b)){
- while (file_exists($destination_b)){
- $n++;
- $imgthu_name_b=$imgthu_name_b."(".$n.")";
- $destination_b = $this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
- }
- $imgthu_name_b=$imgthu_name_b2."(".$n.")";
- $destination_b = $this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
- }
- $imginfo=getimagesize($this->destination);
- switch($imginfo[2])
- {
- case 1:
- $in=@imagecreatefromgif($this->destination);
- break;
- case 2:
- $in=@imagecreatefromjpeg($this->destination);
- break;
- case 3:
- $in=@imagecreatefrompng($this->destination);
- break;
- case 6:
- $in =@imagecreatefrombmp($this->destination);
- break;
- default:
- break;
- }
- //计算略缩图长宽
- if($this->imgthu_fixed==0){
- if($this->imgthu_height>($imginfo[1]/$imginfo[0])*$this->imgthu_width)
- $this->imgthu_width = ($imginfo[0]/$imginfo[1])*$this->imgthu_height;
- else
- $this->imgthu_height=($imginfo[1]/$imginfo[0])*$this->imgthu_width;
- }
- $new = imageCreateTrueColor($this->imgthu_width,$this->imgthu_height);
- ImageCopyResized($new,$in,0,0,0,0,$this->imgthu_width,$this->imgthu_height,$imginfo[0],$imginfo[1]);
- switch ($imginfo[2])
- {
- case 1:
- imagejpeg($new,$destination_b);
- break;
- case 2:
- imagejpeg($new,$destination_b);
- break;
- case 3:
- imagepng($new,$destination_b);
- break;
- case 6:
- imagewbmp($new,$destination_b);
- break;
- }
- }
- //====================================================================================================================
- //====================================================================================================================
- //添加水印功能
- function add_watermark(){
- //1 = GIF,2 = JPG,3 = PNG,4 = SWF,5 = PSD,6 = BMP,7 = TIFF(intel byte order),
- //8 = TIFF(motorola byte order),9 = JPC,10 = JP2,11 = JPX,12 = JB2,13 = SWC,14 = IFF,15 = WBMP,16 = XBM。
- $imginfo=getimagesize($this->destination);
- $im=imagecreatetruecolor($this->img_size[0],$this->img_size[1]); //创建真彩色
- $white=imagecolorallocate($im,255,255,255); //设置颜色
- $black=imagecolorallocate($im,0,0,0);
- $red=imagecolorallocate($im,255,0,0);
- //在 image 图像的坐标 x,y(图像左上角为 0, 0)处用 color 颜色执行区域填充(即与 x, y 点颜色相同且相邻的点都会被填充)。
- imagefill($im,0,0,$white);
- switch($imginfo[2])
- {
- case 1:
- $simage =imagecreatefromgif($this->destination); // 创建一个新的形象,从文件或 URL
- break;
- case 2:
- $simage =imagecreatefromjpeg($this->destination);
- break;
- case 3:
- $simage =imagecreatefrompng($this->destination);
- break;
- case 6:
- $simage =imagecreatefromwbmp($this->destination);
- break;
- default:
- echo ("不支持的文件类型");
- break;
- }
- if(!emptyempty($simage))
- {
- //位置设置
- if($this->watertype==1){
- $str_len=strlen($this->waterstring);
- $str_width=$str_len*10;
- $str_height=20;
- }elseif($this->watertype==1 && file_exists($this->waterimg)){
- $iinfo=getimagesize($this->waterimg);
- $str_width = $iinfo[0];
- $str_height = $iinfo[1];
- }
- switch ($this->waterposition){
- case 1:
- $p_x=5;
- $p_y=$this->img_size[1]-$str_height;
- break;
- case 2:
- $p_x=$this->img_size[0]-$str_width;
- $p_y=$this->img_size[1]-$str_height;
- break;
- case 3:
- $p_x=5;
- $p_y=0;
- break;
- case 4:
- $p_x=$this->img_size[0]-$str_width;
- $p_y=5;
- break;
- case 5:
- $p_x=($this->img_size[0]-$str_width)/2;
- $p_y=($this->img_size[1]-$str_height)/2;
- break;
- }
- imagecopy($im,$simage,0,0,0,0,$this->img_size[0],$this->img_size[1]); //拷贝图像的一部分
- //imagefilledrectangle($im,1,$this->img_size[1]-15,130,$this->img_size[1],$white); //将图片的封闭长方形区域着色
- switch($this->watertype)
- {
- case 1: //加水印字符串
- imagestring($im,10,$p_x,$p_y,$this->waterstring,$red);
- break;
- case 2: //加水印图片
- $simage1 =imagecreatefromgif($this->waterimg);
- imagecopy($im,$simage1,0,0,0,0,85,15);
- imagedestroy($simage1);
- break;
- }
- switch ($imginfo[2])
- {
- case 1:
- //imagegif($nimage, $destination);
- imagejpeg($im, $this->destination);
- break;
- case 2:
- imagejpeg($im, $this->destination);
- break;
- case 3:
- imagepng($im, $this->destination);
- break;//开源代码phpfensi.com
- case 6:
- imagewbmp($im, $this->destination);
- break;
- }
- //覆盖原上传文件
- imagedestroy($im);
- imagedestroy($simage);
- }
- }
- }
- ?>
Tags: php图片上传类 php缩略图
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