图片压缩是我们日常开发中经常使用的操作，在如今需求很多的情况往往，上传的一张图片会被压缩成不同比例的图片，每次去操作也是一件非常繁琐的事情，于是进行了封装了一个压缩图片的操作类，希望大家遇到后，不用再为写很多压缩图片代码烦恼了。
压缩图片的工具类:
<?php /** 图片压缩操作类 v1.0 */ class Image{ private $src; private $imageinfo; private $image; public $percent = 0.1; public function __construct($src){ $this->src = $src; } /** 打开图片 */ public function openImage(){ list($width, $height, $type, $attr) = getimagesize($this->src); $this->imageinfo = array( 'width'=>$width, 'height'=>$height, 'type'=>image_type_to_extension($type,false), 'attr'=>$attr ); $fun = "imagecreatefrom".$this->imageinfo['type']; $this->image = $fun($this->src); } /** 操作图片 */ public function thumpImage(){ $new_width = $this->imageinfo['width'] * $this->percent; $new_height = $this->imageinfo['height'] * $this->percent; $image_thump = imagecreatetruecolor($new_width,$new_height); //将原图复制带图片载体上面，并且按照一定比例压缩,极大的保持了清晰度 imagecopyresampled($image_thump,$this->image,0,0,0,0,$new_width,$new_height,$this->imageinfo['width'],$this->imageinfo['height']); imagedestroy($this->image); $this->image = $image_thump; } /** 输出图片 */ public function showImage(){ header('Content-Type: image/'.$this->imageinfo['type']); $funcs = "image".$this->imageinfo['type']; $funcs($this->image); } /** 保存图片到硬盘 */ public function saveImage($name){ $funcs = "image".$this->imageinfo['type']; $funcs($this->image,$name.'.'.$this->imageinfo['type']); } /** 销毁图片 */ public function __destruct(){ imagedestroy($this->image); } } ?>
测试:
<?php require 'image.class.php'; $src = "001.jpg"; $image = new Image($src); $image->percent = 0.2; $image->openImage(); $image->thumpImage(); $image->showImage(); $image->saveImage(md5("aa123")); ?>
结果:
