欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

php常用图片处理类_PHP

程序员文章站 2022-05-09 16:05:44
...
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;
$img=imagecreatefromgif($imgad);
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);
}
}
?>

以上就是本文的全部内容,希望对大家学习php程序设计有所帮助。