php打包zip图片下载的方法

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1.引入类包 zipfile

class zipfile {    var $datasec = array ();    var $ctrl_dir = array ();    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";    var $old_offset = 0;        function unix2_dostime($unixtime = 0){        $timearray = ($unixtime == 0) ? getdate () : getdate($unixtime);                if ($timearray ['year'] < 1980){            $timearray ['year'] = 1980;            $timearray ['mon'] = 1;            $timearray ['mday'] = 1;            $timearray ['hours'] = 0;            $timearray ['minutes'] = 0;            $timearray ['seconds'] = 0;        }        return (($timearray ['year'] - 1980) << 25) | ($timearray ['mon'] << 21) | ($timearray ['mday'] << 16) | ($timearray ['hours'] << 11) | ($timearray ['minutes'] << 5) | ($timearray ['seconds'] >> 1);    }    function add_file($data, $name, $time = 0){        $name = str_replace('\\', '/', $name);                $dtime = dechex($this->unix2_dostime($time));        $hexdtime = '\x' . $dtime [6] . $dtime [7] . '\x' . $dtime [4] . $dtime [5] . '\x' . $dtime [2] . $dtime [3] . '\x' . $dtime [0] . $dtime [1];        eval('$hexdtime = "' . $hexdtime . '";');                $fr = "\x50\x4b\x03\x04";        $fr .= "\x14\x00";        $fr .= "\x00\x00";        $fr .= "\x08\x00";        $fr .= $hexdtime;                $unc_len = strlen($data);        $crc = crc32($data);        $zdata = gzcompress($data);        $zdata = substr(substr($zdata, 0, strlen($zdata)- 4), 2);        $c_len = strlen($zdata);        $fr .= pack('V', $crc);        $fr .= pack('V', $c_len);        $fr .= pack('V', $unc_len);        $fr .= pack('v', strlen($name));        $fr .= pack('v', 0);        $fr .= $name;                $fr .= $zdata;        $fr .= pack('V', $crc);        $fr .= pack('V', $c_len);        $fr .= pack('V', $unc_len);                $this->datasec [] = $fr;                $cdrec = "\x50\x4b\x01\x02";        $cdrec .= "\x00\x00";        $cdrec .= "\x14\x00";        $cdrec .= "\x00\x00";        $cdrec .= "\x08\x00";        $cdrec .= $hexdtime;        $cdrec .= pack('V', $crc);        $cdrec .= pack('V', $c_len);        $cdrec .= pack('V', $unc_len);        $cdrec .= pack('v', strlen($name));        $cdrec .= pack('v', 0);        $cdrec .= pack('v', 0);        $cdrec .= pack('v', 0);        $cdrec .= pack('v', 0);        $cdrec .= pack('V', 32);                $cdrec .= pack('V', $this->old_offset);        $this->old_offset += strlen($fr);                $cdrec .= $name;                $this->ctrl_dir[] = $cdrec;    }    function add_path($path, $l = 0){        $d = @opendir($path);        $l = $l > 0 ? $l : strlen($path) + 1;     <div style="color:transparent">本文来源gaodai.ma#com搞##代!^码@网*</div><pre>搞gaodaima代码

while($v = @readdir($d)){ if($v == '.' || $v == '..'){ continue; } $v = $path . '/' . $v; if(is_dir($v)){ $this->add_path($v, $l); } else { $this->add_file(file_get_contents($v), substr($v, $l)); } } } function file(){ $data = implode('', $this->datasec); $ctrldir = implode('', $this->ctrl_dir); return $data . $ctrldir . $this->eof_ctrl_dir . pack('v', sizeof($this->ctrl_dir)) . pack('v', sizeof($this->ctrl_dir)) . pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00"; } function add_files($files){ foreach($files as $file){ if (is_file($file)){ $data = implode("", file($file)); $this->add_file($data, $file); } } } function output($file){ $fp = fopen($file, "w"); fwrite($fp, $this->file ()); fclose($fp); }}

2.实例

$dfile =  tempnam('/tmp', 'tmp');//产生一个临时文件，用于缓存下载文件$zip = new \Org\Util\Zipfile();//----------------------$filename = '二维码'.date("Y-m-d H:i",time()).'.zip'; //下载的默认文件名//以下是需要下载的图片数组信息，将需要下载的图片信息转化为类似即可$params['ids'] = explode(',',$params['ids']);//获取图片$image = array(     array('image_src' => 'pic1.jpg', 'image_name' => '图片1.jpg'),     array('image_src' => 'pic2.jpg', 'image_name' => 'pic/图片2.jpg'),);foreach($image as $v){    $zip->add_file(file_get_contents($v['image_src']),  $v['image_name']);    // 添加打包的图片，第一个参数是图片内容，第二个参数是压缩包里面的显示的名称, 可包含路径    // 或是想打包整个目录 用 $zip->add_path($image_path);}//----------------------$zip->output($dfile);// 下载文件ob_clean();header('Pragma: public');header('Last-Modified:'.gmdate('D, d M Y H:i:s') . 'GMT');header('Cache-Control:no-store, no-cache, must-revalidate');header('Cache-Control:pre-check=0, post-check=0, max-age=0');header('Content-Transfer-Encoding:binary');header('Content-Encoding:none');header('Content-type:multipart/form-data');header('Content-Disposition:attachment; filename="'.$filename.'"'); //设置下载的默认文件名header('Content-length:'. filesize($dfile));$fp = fopen($dfile, 'r');while(connection_status() == 0 && $buf = @fread($fp, 8192)){    echo $buf;}fclose($fp);@unlink($dfile);@flush();@ob_flush();exit();

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