PHP图片压缩处理类

<?php
namespace base;

/**
 * 图片压缩类
 *
 * Class Image
 */

class Images2
{

    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
     * @param $name
     */
    public function saveImage($name)
    {

        $funcs = "image" . $this->imageinfo['type'];

        $funcs($this->image, $name . '.' . $this->imageinfo['type']);

    }

    /**
     * 销毁图片
     */
    public function __destruct()
    {

        imagedestroy($this->image);

    }

}


?>

调用方法：

$image = new Images2($upload_res['data']['path']);
           $image->percent = 0.2;

           $image->openImage();

           $image->thumpImage();

           $image->showImage();

           $image->saveImage(md5("asd1123456789"));