thinkphp3.2.x版本中图片上传缩略图的解决方案

调用方式很简单 get_sc($cover_id,[$width=180,$height=auto,$cut])

@param $cover_id 图片ID___

@param $width 宽度___

@param $height 高___

@param $cut 是否切割默认不切割___

直接返回新图片的url

可以替换get_cover($cover_id,'path');

get_cover里做了简单的默认图片判断，大家可以自己改一下。

/**

 * 获取缩略图

 * @param unknown_type $filename 原图路劲、url

 * @param unknown_type $width 宽度

 * @param unknown_type $height 高

 * @param unknown_type $cut 是否切割 默认不切割

 * @return string

 */

function getThumbImage($filename, $width = 100, $height = 'auto',$cut=false, $replace = false)

{

    define('UPLOAD_URL', '');

    define('UPLOAD_PATH', '');

    $filename = str_ireplace(UPLOAD_URL, '', $filename); //将URL转化为本地地址

    $info = pathinfo($filename);

    $oldFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '.' . $info['extension'];

    $thumbFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '_' . $width . '_' . $height . '.' . $info['extension'];

    $oldFile = str_replace('\\', '/', $oldFile);

    $thumbFile = str_replace('\\', '/', $thumbFile);

    $filename = ltrim($filename, '/');

    $oldFile = ltrim($oldFile, '/');

    $thumbFile = ltrim($thumbFile, '/');

    //原图不存在直接返回

    if (!file_exists(UPLOAD_PATH . $oldFile)) {

        @unlink(UPLOAD_PATH . $thumbFile);

        $info['src'] = $oldFile;

        $info['width'] = intval($width);

        $info['height'] = intval($height);

        return $info;

        //缩图已存在并且 replace替换为false

    } elseif (file_exists(UPLOAD_PATH . $thumbFile) && !$replace) {

        $imageinfo = getimagesize(UPLOAD_PATH . $thumbFile);

        //dump($imageinfo);exit;

        $info['src'] = $thumbFile;

        $info['width'] = intval($imageinfo[0]);

        $info['height'] = intval($imageinfo[1]);

        return $info;

        //执行缩图操作

    } else {

        $oldimageinfo = getimagesize(UPLOAD_PATH . $oldFile);

        $old_image_width = intval($oldimageinfo[0]);

        $old_image_height = intval($oldimageinfo[1]);

        if ($old_image_width <= $width && $old_image_height <= $height) {

            @unlink(UPLOAD_PATH . $thumbFile);

            @copy(UPLOAD_PATH . $oldFile, UPLOAD_PATH . $thumbFile);

            $info['src'] = $thumbFile;

            $info['width'] = $old_image_width;

            $info['height'] = $old_image_height;

            return $info;

        } else {

            //生成缩略图

            // tsload( ADDON_PATH.'/library/Image.class.php' );

            // if($cut){

            //     Image::cut(UPLOAD_PATH.$filename, UPLOAD_PATH.$thumbFile, $width, $height);

            // }else{

            //     Image::thumb(UPLOAD_PATH.$filename, UPLOAD_PATH.$thumbFile, '', $width, $height);

            // }

            //生成缩略图 - 更好的方法

            if ($height == "auto") $height = 0;

            //import('phpthumb.PhpThumbFactory');

            require_once('ThinkPHP\Library\Vendor\phpthumb\PhpThumbFactory.class.php');

            $thumb = PhpThumbFactory::create(UPLOAD_PATH . $filename);

            //dump($thumb);exit;

            if ($cut) {

                $thumb->adaptiveResize($width, $height);

            } else {

                $thumb->resize($width, $height);

            }

            $res = $thumb->save(UPLOAD_PATH . $thumbFile);

            //缩图失败

            if (!$res) {

                $thumbFile = $oldFile;

            }

            $info['width'] = $width;

            $info['height'] = $height;

            $info['src'] = $thumbFile;

            return $info;

        }

    }

}

function get_sc($cover_id, $width = 100, $height = 'auto', $cut = false, $replace = false)

{

    $picture = M('Picture')->where(array('status' => 1))->getById($cover_id);

    if(empty($picture))

    {

        return 'Public/static/assets/img/nopic.png';

    }

    $attach = getThumbImage($picture['path'], $width, $height, $cut, $replace);

    return $attach['src'];

}

调用的第三方类库，请到这里类库下载

秒客网

thinkphp3.2.x版本中图片上传缩略图的解决方案

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