php常用图片处理类_PHP

本文为大家分享的php常用图片处理类，供大家参考学习，具体内容如下

types=$types;$this->image=$this->imagesources($imageaddress);$this->width=$this->imagesizex();$this->height=$this->imagesizey();$this->value1=$value1;$this->value2=$value2;$this->endaddress=$endaddress;}function outimage(){ //根据传入type值的不同，输出不同的功能switch($this->types){case 1:$this->scaling();break;case 2:$this->clipping();break;case 3:$this->imagewater();break;default:return false;}}private function imagewater(){ //http://www.hzhuti.com 加图片水印功能//用函数获取水印文件的长和宽$imagearrs=$this->getimagearr($this->value1);//调用函数计算出水印加载的位置$positionarr=$this->position($this->value2, $imagearrs[0], $imagearrs[1]);//加水印imagecopy($this->image, $this->imagesources($this->value1), $positionarr[0], $positionarr[1], 0, 0, $imagearrs[0], $imagearrs[1]);//调用输出方法保存$this->output($this->image);}private function clipping(){ //图片裁剪功能//将传进来的值分别赋给变量list($src_x, $src_y)=explode(",", $this->value1);list($dst_w, $dst_h)=explode(",", $this->value2);if($this->width height image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $dst_w, $dst_h);//调用输出方法保存$this->output($newimg);}private function scaling(){ //图片缩放功能//获取等比缩放的宽和高$this-> proimagesize();//根据参数进行缩放,并调用输出函数保存处理后的文件$this->output($this->imagescaling());}private function imagesources($imgad){ //获取图片类型并打开图像资源$imagearray=$this->getimagearr($imgad);switch($imagearray[2]){case 1://gif$this->imgtype=1;$img=imagecreatefromgif($im<div style="color:transparent">本&文来源gaodai^.ma#com搞#代!码网</div><strong>搞gaodaima代码</strong>gad);break;case 2://jpeg$this->imgtype=2;$img=imagecreatefromjpeg($imgad);break;case 3://png$this->imgtype=3;$img=imagecreatefrompng($imgad);break;default:return false;}return $img;}private function imagesizex(){ //获得图片宽度return imagesx($this->image);}private function imagesizey(){ //获取图片高度return imagesy($this->image);}private function proimagesize(){ //计算等比缩放的图片的宽和高if($this->value1 && ($this->width height)) { //等比缩放算法$this->value1=round(($this->value2/ $this->height)*$this->width);}else{$this->value2=round(($this->value1/ $this->width) * $this->height);}}private function imagescaling(){//图像缩放功能，返回处理后的图像资源$newimg=imagecreatetruecolor($this->value1, $this->value2);$tran=imagecolortransparent($this->image);//处理透明算法if($tran >= 0 && $tran image)){$tranarr=imagecolorsforindex($this->image, $tran);$newcolor=imagecolorallocate($newimg, $tranarr['red'], $tranarr['green'], $tranarr['blue']);imagefill($newimg, 0, 0, $newcolor);imagecolortransparent($newimg, $newcolor);}imagecopyresampled($newimg, $this->image, 0, 0, 0, 0, $this->value1, $this->value2, $this->width, $this->height);return $newimg;}private function output($image){//输出图像switch($this->imgtype){case 1:imagegif($image, $this->endaddress);break;case 2:imagejpeg($image, $this->endaddress);break;case 3:imagepng($image, $this->endaddress);break;default:return false;}}private function getimagearr($imagesou){//返回图像属性数组方法return getimagesize($imagesou);}private function position($num, $width, $height){//根据传入的数字返回一个位置的坐标,$width和$height分别代表插入图像的宽和高switch($num){case 1:$positionarr[0]=0;$positionarr[1]=0;break;case 2:$positionarr[0]=($this->width-$width)/2;$positionarr[1]=0;break;case 3:$positionarr[0]=$this->width-$width;$positionarr[1]=0;break;case 4:$positionarr[0]=0;$positionarr[1]=($this->height-$height)/2;break;case 5:$positionarr[0]=($this->width-$width)/2;$positionarr[1]=($this->height-$height)/2;break;case 6:$positionarr[0]=$this->width-$width;$positionarr[1]=($this->height-$height)/2;break;case 7:$positionarr[0]=0;$positionarr[1]=$this->height-$height;break;case 8:$positionarr[0]=($this->width-$width)/2;$positionarr[1]=$this->height-$height;break;case 9:$positionarr[0]=$this->width-$width;$positionarr[1]=$this->height-$height;break;case 0:$positionarr[0]=rand(0, $this->width-$width);$positionarr[1]=rand(0, $this->height-$height);break;}return $positionarr;}function __destruct(){imagedestroy($this->image);}}?>

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