NN2020042801/app/admin/controller/ImgController.php

<?php
namespace  app\admin\controller;
use cmf\controller\AdminBaseController;
use think\Db;

class ImgController {

    // public function initialize(){
    //     parent::initialize();
    //     $username = $_SESSION['think']['name'];
    //     $userid = $_SESSION['think']['ADMIN_ID'];
    //     //判断是否是编辑管理员
    //     $iseditor = 0;
    //     $iseditor = Db::name('role_user')->where('role_id',3)->where('user_id',$userid)->count();
    //     $this->iseditor = $iseditor;
    //     $this->uname = $username;
    //     $this->assign('iseditor',$iseditor);
    // }
    
    /**
     * desription 压缩图片
     * @param sting $imgsrc 图片路径
     * @param string $imgdst 压缩后保存路径
     */
    public function compressedImage($imgsrc, $imgdst) {  
        
        list($width, $height, $type) = getimagesize($imgsrc);    //list可以将返回的数组值赋值给变量
       

        $new_width = $width;//压缩后的图片宽
        $new_height = $height;//压缩后的图片高
 // echo $new_width;echo "<br/>";echo $new_height;echo "<br/>";
        // if($width >= 600){
        //     $per = 600 / $width;//计算比例
        //     $new_width = $width * $per;
        //     $new_height = $height * $per;
        // }
 // echo $new_width;echo "<br/>";echo $new_height;die();
        switch ($type) {
            case 1:
                $giftype = check_gifcartoon($imgsrc);
                if ($giftype) {
                    header('Content-Type:image/gif');
                    $image_wp = imagecreatetruecolor($new_width, $new_height);
                    $image = imagecreatefromgif($imgsrc);
                    imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
                    //90代表的是质量、压缩图片容量大小
                    imagejpeg($image_wp, $imgdst, 90);
                    imagedestroy($image_wp);
                    imagedestroy($image);
                }
                break;
            case 2:
                 // header('Content-Type:image/png');echo 'fdsfsfs111';die();
                $image_wp = imagecreatetruecolor($new_width, $new_height);
                $image = imagecreatefromjpeg($imgsrc); 
                imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
                //90代表的是质量、压缩图片容量大小
                imagejpeg($image_wp, $imgdst, 90);
                imagedestroy($image_wp);
                imagedestroy($image);
                break;
            case 3:
            //    header('Content-Type:image/png');
                $image_wp = imagecreatetruecolor($new_width, $new_height);
                $image = imagecreatefrompng($imgsrc);
                imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
                //90代表的是质量、压缩图片容量大小
                imagejpeg($image_wp, $imgdst, 50);
                imagedestroy($image_wp);
                imagedestroy($image);
                break;
        }
    }


     /**
     * 缩略图
     * @param $file
     * @param int $type
     * @return $this
     */
    public static function imageThumb($file, $type=1, $params=[]){
        $siteInfo = cmf_get_site_info();
        $thumbWidth = isset($siteInfo['thumb_width'])? intval($siteInfo['thumb_width']) : 0;
        $thumbHeight = isset($siteInfo['thumb_height'])? intval($siteInfo['thumb_height']) : 0;

        $width = isset($params['width'])? $params['width'] : 0;
        $height = isset($params['height'])? $params['height'] : 0;
        $thumbWidth = $thumbWidth>600? $thumbWidth : 600;
        $thumbHeight = $thumbHeight>600? $thumbHeight : 600;
        $thumbWidth = $width? $width : $thumbWidth;
        $thumbHeight = $height? $height : $thumbHeight;
        // 要加水印的图片
        $realFilename = 'upload/' . $file;
        if (!file_exists($realFilename)) {
            return false;
        }

        $image = \think\Image::open($realFilename);
        $filepath = dirname($realFilename);
        $paths = explode('_',basename($realFilename));
        $filename = end($paths);
        $thumbfile = $filepath . '/thumb_' . $thumbWidth . '_' . $thumbHeight . '_' . $type . '_' . $filename;
        $image->thumb($thumbWidth, $thumbHeight, $type)->save($thumbfile);
        return preg_replace("/^upload\//", '', $thumbfile);
    }

    //压缩图片2

      public static function imageThumb2($imgsrc, $imgdst, $type=3){
       
        list($width, $height, $type) = getimagesize($imgsrc);
       
        $new_width = $width;//压缩后的图片宽
        $new_height = $height;//压缩后的图片高
 
        // if($width >= 600){
        //     $per = 600 / $width;//计算比例
        //     $new_width = $width * $per;
        //     $new_height = $height * $per;
        // }

        $image = \think\Image::open($imgsrc);
     //   $filepath = dirname($imgsrc);   //不需要获取根目录
        //$paths = explode('_',basename($realFilename));
        //$filename = end($paths);
      //
        $image->thumb($new_width, $new_height, $type)->save($imgdst);
        return preg_replace("/^upload\//", '', $imgdst);
    }

}
?>