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<?php
/**
* @author wolf
*
*/
classImage {
//类开始
public$originimage="";//源图片文件地址
public$imageext="";//源图片格式
public$thumbimage="";//缩略图文件存放地址
public$thumb_maxwidth= 1440;//缩略图最大宽度
public$thumb_maxheight= 900;//缩略图最大高度
public$watermark_text="";//水印文字内容
public$watermark_minwidth= 300;//源图片最小宽度：大于此值时加水印
public$watermark_minheight= 200;//源图片最小高度：大于此值时加水印
public$watermark_fontfile="";//字体文件
public$watermark_fontsize= 14;//字体大小
public$watermark_logo="config/water.png";//水印LOGO地址
public$watermark_transparent= 20;//水印LOGO不透明度
private$origin_width= 0;//源图片宽度
private$origin_height= 0;//源图片高度
private$imageQuilty= 90;//图片质量
private$tmp_originimage="";//临时图片(源图片)
private$tmp_thumbimage="";//临时图片(缩略图)
private$tmp_waterimage="";//临时图片(水印LOGO)
private$_waterPosition= 2;//1正中间 2右下角
//生成缩略图
publicfunctiongen_thumbimage() {
if($this->originimage ==""||$this->thumbimage =="") {
return0;
}
$this->get_oriwidthheight ();
if($this->origin_width <$this->thumb_maxwidth &&$this->origin_height <$this->thumb_maxheight) {
$this->thumb_maxwidth =$this->origin_width;
$this->thumb_maxheight =$this->origin_height;
}else{
if($this->origin_width <$this->origin_height) {
$this->thumb_maxwidth = ($this->thumb_maxheight /$this->origin_height) *$this->origin_width;
}else{
$this->thumb_maxheight = ($this->thumb_maxwidth /$this->origin_width) *$this->origin_height;
}
}
$this->get_imagetype ();
$this->gen_tmpimage_origin ();
$this->gen_tmpimage_thumb ();
if($this->tmp_originimage ==""||$this->tmp_thumbimage =="") {
return- 1;
}
imagecopyresampled ($this->tmp_thumbimage,$this->tmp_originimage, 0, 0, 0, 0,$this->thumb_maxwidth,$this->thumb_maxheight,$this->origin_width,$this->origin_height );
switch($this->imageext) {
case"gif":
imagegif ($this->tmp_thumbimage,$this->thumbimage );
return1;
break;
case"jpg":
imagejpeg ($this->tmp_thumbimage,$this->thumbimage,$this->imageQuilty );
return2;
break;
case"png":
imagepng ($this->tmp_thumbimage,$this->thumbimage );
return3;
break;
default:
return- 2;
break;
}
}
//添加文字水印
publicfunctionadd_watermark1() {
if($this->originimage ==""||$this->watermark_text ==""||$this->watermark_fontfile =="") {
return0;
}
$this->get_oriwidthheight ();
if($this->origin_width <$this->watermark_minwidth ||$this->origin_height <$this->watermark_minheight) {
return0;
}
$this->get_imagetype ();
$this->gen_tmpimage_origin ();
if($this->tmp_originimage =="") {
return- 1;
}
$textcolor= imagecolorallocate ($this->tmp_originimage, 255, 0, 0 );
$angle= 0;
$px=$this->origin_width / 2 - 200;
$py=$this->origin_height / 2 - 10;
imagettftext ($this->tmp_originimage,$this->watermark_fontsize,$angle,$px,$py,$textcolor,$this->watermark_fontfile,$this->watermark_text );
switch($this->imageext) {
case"gif":
imagegif ($this->tmp_originimage,$this->originimage );
return1;
break;
case"jpg":
imagejpeg ($this->tmp_originimage,$this->originimage,$this->imageQuilty );
return2;
break;
case"png":
imagepng ($this->tmp_originimage,$this->originimage );
return3;
break;
default:
return- 2;
break;
}
}
//添加LOGO水印
publicfunctionadd_watermark2() {
if($this->originimage ==""||$this->watermark_logo =="") {
return0;
}
$this->get_oriwidthheight ();
if($this->origin_width <$this->watermark_minwidth ||$this->origin_height <$this->watermark_minheight) {
return0;
}
$this->get_imagetype ();
$this->gen_tmpimage_origin ();
$this->gen_tmpimage_waterlogo ();
if($this->tmp_originimage ==""||$this->tmp_waterimage =="") {
return- 1;
}
list ($logo_width,$logo_height) =getimagesize($this->watermark_logo );
//正中间
$waterZb=$this->waterPosition ($logo_width,$logo_height);
$px=$waterZb['x'];
$py=$waterZb['y'];
imagecopymerge ($this->tmp_originimage,$this->tmp_waterimage,$px,$py, 0, 0,$logo_width,$logo_height,$this->watermark_transparent );
switch($this->imageext) {
case"gif":
imagegif ($this->tmp_originimage,$this->originimage );
return1;
break;
case"jpg":
imagejpeg ($this->tmp_originimage,$this->originimage,$this->imageQuilty );
return2;
break;
case"png":
imagepng ($this->tmp_originimage,$this->originimage );
return3;
break;
default:
return- 2;
break;
}
}
/**
* 上传缩略图
* 注意上传文件大小限制
*@param String $files $_FILES['upload'] 类型
*@param String $path 存储的目录 默认在/static/attached/
*@param boolean $isWater 是否添加水印
* @return string $filePath 网页url图片路径
*/
publicfunctionupload($files,$path,$isWater) {
if(is_uploaded_file($files['tmp_name'] )) {
$upfile=$files;
$name=$upfile[name];
$type=$upfile[type];
$size=$upfile[size];
$tmp_name=$upfile[tmp_name];
$error=$upfile[error];
if($size> 1048576) {
returnarray('status'=> false,'message'=>"$name图片太大超过1MB");
}
$rs=$this->getImageSize($tmp_name);
if(!$rs['status']) {
$rs['message'] =$name.$rs['message'];
return$rs;
}
// 创建文件夹
$save_path=getcwd() ."/static/attached/".$path."/";
$save_url="./static/attached/".$path."/";
$ym=date("Ym");
$save_path.=$ym."/";
$save_url.=$ym."/";
if(!file_exists($save_path)) {
mkdir($save_path);
}
if($error=='0') {
$fileType=substr($name,strpos($name,".") + 1 );
$prefix=$this->getRandPrefix ();
$newName=date("YmdHi") .$prefix.".".$fileType;
$filepath=$save_path.$newName;
move_uploaded_file ($tmp_name,$filepath);
}
if($isWater) {
$this->water ($filepath);
}
returnarray('status'=> true,'message'=>$save_url.$newName);
}
}
/**
* 图片增加水印处理
* @param unknown_type $image
*/
publicfunctionwater($image) {
$this->watermark_logo = ROOT .$this->watermark_logo;
$this->originimage =$image;
//LOGO水印
$this->add_watermark2 ();
}
/**
*
* 获取随机前缀
*/
privatefunctiongetRandPrefix() {
$string="abcdefghijklmnopqrstuvwxyz0123456789";
$prefix='';
for($i= 0;$i< 4;$i++) {
$rand= rand ( 0, 33 );
$prefix.=$string{$rand};
}
return$prefix;
}
//检测图片大小
privatefunctiongetImageSize($image) {
list ($width,$height,$type,$attr) =getimagesize($image);
if($type!= 2 &&$type!= 3) {
returnarray('status'=> false,'message'=>"图片格式不正确,请上传JPG或者PNG图片".$type);
}
//检测图片大小
if($width> 1440) {
returnarray('status'=> false,'message'=>"图片宽度请小于1440px,当前为".$width."px");
}
if($height> 900) {
returnarray('status'=> false,'message'=>"图片高度请小于900px,当前为".$height."px");
}
returnarray('status'=> true );
}
/**
* 生成缩略图
*
* @param String $imagefile 原始文件
* @param String $thumbWidth 缩略图宽度
* @param String $thumbHeight 缩略图高度
* @return String 缩略图url
*/
publicfunctionreduceImage($imagefile,$thumbWidth,$thumbHeight,$path="thumb") {
// 生成缩略图
$dir=date("Ym", time () );
$imagefile= ROOT .$imagefile;
$imagefile_s= ROOT ."static/attached/".$path."/".$dir."/s_".basename($imagefile);
$imagetrans=newImage ();
$imagetrans->originimage =$imagefile;
$imagetrans->thumbimage =$imagefile_s;
$imagetrans->thumb_maxwidth =$thumbWidth;
$imagetrans->thumb_maxheight =$thumbHeight;
$isokid=$imagetrans->gen_thumbimage ();
return"./static/attached/".$path."/".$dir."/s_".basename($imagefile);
}
/**
* 水印位置
* @param int $logo_width
* @param int $logo_height
* @return 水印坐标
*/
privatefunctionwaterPosition($logo_width,$logo_height) {
switch($this->_waterPosition) {
case1 :
$px=$this->origin_width / 2 -$logo_width/ 2;
$py=$this->origin_height / 2 -$logo_height/ 2;
break;
case2 :
$px=$this->origin_width -$logo_width- 10;
$py=$this->origin_height -$logo_height- 10;
break;
default:
$px=$this->origin_width / 2 -$logo_width/ 2;
$py=$this->origin_height / 2 -$logo_height/ 2;
break;
}
returnarray('x'=>$px,'y'=>$py);
}
//获取图片尺寸
privatefunctionget_oriwidthheight() {
list ($this->origin_width,$this->origin_height ) =getimagesize($this->originimage );
return1;
}
/*
* 检测图片格式
* 原方法需要开启exif 扩展
*/
privatefunctionget_imagetype() {
$ext=$this->getImgext ($this->originimage );
switch($ext) {
case1 :
$this->imageext ="gif";
break;
case2 :
$this->imageext ="jpg";
break;
case3 :
$this->imageext ="png";
break;
default:
$this->imageext ="unknown";
break;
}
}
//创建临时图片(源图片)
privatefunctiongen_tmpimage_origin() {
$ext=$this->getImgext ($this->originimage );
switch($ext) {
case1 :
$this->tmp_originimage = imagecreatefromgif ($this->originimage );
$bgcolor= imagecolorallocate ($this->tmp_originimage, 0, 0, 0 );
$bgcolortrans= imagecolortransparent ($this->tmp_originimage,$bgcolor);
break;
case2 :
$this->tmp_originimage = imagecreatefromjpeg ($this->originimage );
break;
case3 :
$this->tmp_originimage = imagecreatefrompng ($this->originimage );
imagesavealpha ($this->tmp_originimage, true );
break;
default:
$this->tmp_originimage ="";
break;
}
}
//创建临时图片(缩略图)
privatefunctiongen_tmpimage_thumb() {
$ext=$this->getImgext ($this->originimage );
switch($ext) {
case1 :
$this->tmp_thumbimage = imagecreatetruecolor ($this->thumb_maxwidth,$this->thumb_maxheight );
$bgcolor= imagecolorallocate ($this->tmp_thumbimage, 255, 255, 255 );
imagefill ($this->tmp_thumbimage, 0, 0,$bgcolor);
break;
case2 :
$this->tmp_thumbimage = imagecreatetruecolor ($this->thumb_maxwidth,$this->thumb_maxheight );
break;
case3 :
$this->tmp_thumbimage = imagecreatetruecolor ($this->thumb_maxwidth,$this->thumb_maxheight );
$bgcolor= imagecolorallocate ($this->tmp_thumbimage, 255, 255, 255 );
imagefill ($this->tmp_thumbimage, 0, 0,$bgcolor);
imagealphablending ($this->tmp_thumbimage, false );
imagesavealpha ($this->tmp_thumbimage, true );
break;
default:
$this->tmp_thumbimage ="";
break;
}
}
//创建临时图片(LOGO水印)
privatefunctiongen_tmpimage_waterlogo() {
$ext=$this->getImgext ($this->watermark_logo );
switch($ext) {
case1 :
$this->tmp_waterimage = imagecreatefromgif ($this->watermark_logo );
$bgcolor= imagecolorallocate ($this->tmp_waterimage, 0, 0, 0 );
$bgcolortrans= imagecolortransparent ($this->tmp_waterimage,$bgcolor);
break;
case2 :
$this->tmp_waterimage = imagecreatefromjpeg ($this->watermark_logo );
break;
case3 :
$this->tmp_waterimage = imagecreatefrompng ($this->watermark_logo );
imagesavealpha ($this->tmp_waterimage, true );
break;
default:
$this->tmp_waterimage ="";
break;
}
}
/*
* 获取后缀名
*/
publicfunctiongetImgext($filename) {
returnexif_imagetype ($filename);
}
//释放资源
publicfunction__destruct() {
if(is_object($this->tmp_originimage ) == true) {
imagedestroy ($this->tmp_originimage );
}
if(is_object($this->tmp_thumbimage ) == true) {
imagedestroy ($this->tmp_thumbimage );
}
if(is_object($this->tmp_waterimage ) == true) {
imagedestroy ($this->tmp_waterimage );
}
}
}
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