网上找的php下载图片到本地,能用,还没整理

xiaoxiao2021-02-28  30

<?php 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; 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); } } //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 = new zipfile(); //---------------------- $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 $image = array( array('image_src' => 'pic1.jpg', 'image_name' => '图片1.jpg'), array('image_src' => 'pic2.jpg', 'image_name' => 'pic/图片2.jpg'), ); foreach($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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