php-實現多張圖片打包下載

實現多張圖片打包下載

關於ini_set(“memory_limit”,“512M”);設置可自行處理，多圖下載時壓縮包過大進行適當設置，在php.ini設置也可以,一處設置好就可，不用這行，記得註釋。
關於下載文件名中文出錯的，$name = iconv('UTF-8','GBK',$name);不用中文可以註釋，字符編碼GB2312和GBK的使用，使用GB2312下載的文件名有部分解釋不到，使用GBK正常使用。GBK是在國家標準GB2312基礎上擴容後兼容GB2312的標準。GBK編碼專門用來解決中文編碼的，是雙字節的。不論中英文都是雙字節的。可進行適當使用。

創建zipfile.php文件

<?php
namespace myclass\zipimgfile;

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);
        $name = iconv('UTF-8','GBK',$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;
        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(){
        ini_set("memory_limit","512M");
        $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);
    }

}

引用代碼

$dfile =  tempnam('/tmp', 'tmp');//產生一個臨時文件，用於緩存下載文件
$zip = Au("zipimgfile/zipfile");

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

$filename = '圖片下載-'.date("Y-m-d H:i",time()).'.zip'; //下載的默認文件名

//以下是需要下載的圖片數組信息，將需要下載的圖片信息轉化爲類似即可

$params['ids'] = explode(',',$params['ids']);

//獲取圖片
$image = array(array(image_src=>“url”,image_name=>“name”));

foreach($image as $v){
    $zip->add_file(file_get_contents($v['image_src']),  $v['image_name']);
    // 添加打包的圖片，第一個參數是圖片內容，第二個參數是壓縮包裏面的顯示的名稱, 可包含路徑
    // 或是想打包整個目錄 用 $zip->add_path($image_path);
}

//----------------------
$zip->output($dfile);

// 下載文件
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="'.$filename.'"'); //設置下載的默認文件名
header('Content-length:'. filesize($dfile));

$fp = fopen($dfile, 'r');

while(connection_status() == 0 && $buf = @fread($fp, 8192)){
    echo $buf;
}
fclose($fp);
@unlink($dfile);
@flush();
@ob_flush();
exit();