圖片壓縮是我們?nèi)粘ｉ_發(fā)中經(jīng)常使用的操作，在如今需求很多的情況往往，上傳的一張圖片會被壓縮成不同比例的圖片，每次去操作也是一件非常繁瑣的事情，于是進(jìn)行了封裝了一個壓縮圖片的操作類，希望大家遇到后，不用再為寫很多壓縮圖片代碼煩惱了。
?php
/**
圖片壓縮操作類
v1.0
*/
class Image{
private $src;
private $imageinfo;
private $image;
public $percent = 0.1;
public function __construct($src){
$this->src = $src;
}
/**
打開圖片
*/
public function openImage(){
list($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);
}
/**
操作圖片
*/
public function thumpImage(){
$new_width = $this->imageinfo['width'] * $this->percent;
$new_height = $this->imageinfo['height'] * $this->percent;
$image_thump = imagecreatetruecolor($new_width,$new_height);
//將原圖復(fù)制帶圖片載體上面，并且按照一定比例壓縮,極大的保持了清晰度
imagecopyresampled($image_thump,$this->image,0,0,0,0,$new_width,$new_height,$this->imageinfo['width'],$this->imageinfo['height']);
imagedestroy($this->image);
$this->image = $image_thump;
}
/**
輸出圖片
*/
public function showImage(){
header('Content-Type: image/'.$this->imageinfo['type']);
$funcs = "image".$this->imageinfo['type'];
$funcs($this->image);
}
/**
保存圖片到硬盤
*/
public function saveImage($name){
$funcs = "image".$this->imageinfo['type'];
$funcs($this->image,$name.'.'.$this->imageinfo['type']);
}
/**
銷毀圖片
*/
public function __destruct(){
imagedestroy($this->image);
}
}
?>
