PHP按一定比例紧缩图片(维持清晰度)
发布时间:09/01 来源:未知 浏览:
关键词:
紧缩图片的工具类:
<?php /** 图片紧缩操纵类 v1.0 */ class Image{ private $src; private $imageinfo; private $image; public $percent = 0.1; public function __construct($src){ $this->src = $src; } /** 翻开图片 */ public function openImage(){ list($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); } /** 操纵图片 */ public function thumpImage(){ $new_width = $this->imageinfo['width'] * $this->percent; $new_height = $this->imageinfo['height'] * $this->percent; $image_thump = imagecreatetruecolor($new_width,$new_height); //将原图复制带图片载体上面,并且依照必然比例紧缩,极大的保持了清楚度 imagecopyresampled($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); } /** 留存图片到硬盘 */ public function saveImage($name){ $funcs = "image".$this->imageinfo['type']; $funcs($this->image,$name.'.'.$this->imageinfo['type']); } /** 烧毁图片 */ 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:
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