PHP pdf 转 图片

function pdf2png($pdf,$path,$page=-1)
    {
        if(!extension_loaded('imagick'))
        {
            return false;
        }
        if(!file_exists($pdf))
        {
            return false;
        }
        if(!is_readable($pdf))
        {
            return false;
        }
        $im = new \Imagick();
        $im->setResolution(150,150);
        $im->setCompressionQuality(100);
//        print_r($pdf);die;
        if($page==-1)
            $im->readImage($pdf);
        else
            $im->readImage($pdf."[".$page."]");
        foreach ($im as $Key => $Var)
        {
            $Var->setImageFormat('png');
            $filename = $path. md5($Key.time()).'.png';
            if($Var->writeImage($filename) == true)
            {
                $Return[] = $filename;
            }
        }
        //返回转化图片数组，由于pdf可能多页，此处返回二维数组。
        return $Return;
    }

注意：++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

先安装   imagick  扩展