php图像操作类 本款程序可以获取图片大小,格式等信息,同时还可以对图片进行缩略图处理与给图片加水印功能哦。
php教程图像操作类
本款程序可以获取图片大小,格式等信息,同时还可以对图片进行缩略图处理与给图片加水印功能哦。
class image{ public $filename; private $info; private $im; //构造 public function __construct($filename){ $this->filename = $filename; $this->info = @getimagesize($filename); if($this->info[2]>3){echo "只支持gif、jpeg、png 格式。";exit;} } // 载入 public function imgload(){ switch($this->info[2]){ case 1: $this->im=@imagecreatefromgif($this->filename); break; case 2: $this->im=@imagecreatefromjpeg($this->filename); break; case 3: $this->im=@imagecreatefrompng($this->filename); break; } } // 保存 public function imagesave($img,$savename,$inf){ switch($inf){ case 1: imagegif($img,$savename);; break; case 2: imagejpeg($img,$savename);; break; case 3: imagepng($img,$savename);; break; } } //滤镜 public function filter($arg=1,$savename=''){ $this->imgload(); if($savename=='')$savename='f_'.$this->filename; $ok=false; switch($arg){ case 1: imagefilter($this->im,img_filter_negate);//反色 $ok=true; break; case 2: imagefilter($this->im,img_filter_grayscale); //黑白 $ok=true; break; case 3: imagefilter($this->im,img_filter_emboss);//浮雕 $ok=true; break; case 4: imagefilter($this->im,img_filter_gaussian_blur); //高斯模糊 $ok=true; break; case 5: imagefilter($this->im,img_filter_brightness,50); //亮度50 $ok=true; break; case 6: imagefilter($this->im,img_filter_contrast,-50); //对比度-50 $ok=true; break; } if($ok){ $this->imagesave($this->im,$savename,$this->info[2]); //写文件 imagedestroy($this->im); return 1; }else{ imagedestroy($this->im); return 0;} }
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