PHP实现图片批量打包下载功能

2024-09-04 11:44:41

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来源：转载

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上次遇到一个需要打包下载批量图片的问题，找了一下发现这个好方法，记录一下。

首先新建一个zipfile打包类：

<?php

classzipfile {

  var$datasec=array();

  var$ctrl_dir=array();

  var$eof_ctrl_dir="/x50/x4b/x05/x06/x00/x00/x00/x00";

  var$old_offset= 0;

   //Vevb.com

  functionunix2_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);

  }

  functionadd_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);

    $zdata=<a href="/tags.php/substr/" target="_blank">substr</a>(substr($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;

  }

  functionadd_path($path,$l= 0){

    $d= @<a href="/tags.php/opendir/" target="_blank">opendir</a>($path);

    $l=$l> 0 ?$l:strlen($path) + 1;

    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));

      }

    }

  }

  functionfile(){

    $data= implode('',$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";

  }



  functionadd_files($files){

    <a href="/tags.php/foreach/" target="_blank">foreach</a>($filesas$file){

      if(is_file($file)){

        $data= implode("", file($file));

        $this->add_file($data,$file);

      }

    }

  }

  functionoutput($file){

    $fp=<a href="/tags.php/fopen/" target="_blank">fopen</a>($file,"w");

    fwrite($fp,$this->file ());

    fclose($fp);

  }

}



//下面是实例操作过程：

$dfile= tempnam('/tmp','tmp');//产生一个临时文件，用于缓存下载文件

$zip=newzipfile();

//----------------------

$filename='image.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

$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($imageas$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();

?>