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php实现zip压缩文件解压缩代码分享(简单易懂)_PHP

Jun 01, 2016 am 11:53 AM
php

仔细的研究了一下,原来用php写的解压程序效率比想象的还是高很多的,既然这么好,干脆再优化一下后用到自己后台中,虽然现在大部分空间的控制面板中有压缩和解压这个功能,但是毕竟有时候有些麻烦。

做这个之前,没有接触过php压缩这一块,网上搜了一些,大多数都是php压缩类、压缩函数,少则几百行,多的就几千行代码。这对于我这种新手来说很摸不到头脑,再说我也不用这么复杂的功能。最后参考函数手册,理清楚了几个相关的函数后,就明白了怎么去整了。

php实现zip压缩文件解压缩代码分享(简单易懂)_PHP

记得要开启 zip ,把 php.ini 中的 extension=php_zip.dll 前面的分号去掉。

源码范例:

复制代码 代码如下:

//需开启配置 php_zip.dll
//phpinfo();
header("Content-type:text/html;charset=utf-8");

function get_zip_originalsize($filename, $path) {
 //先判断待解压的文件是否存在
 if(!file_exists($filename)){
  die("文件 $filename 不存在!");
 } 
 $starttime = explode(' ',microtime()); //解压开始的时间

 //将文件名和路径转成windows系统默认的gb2312编码,否则将会读取不到
 $filename = iconv("utf-8","gb2312",$filename);
 $path = iconv("utf-8","gb2312",$path);
 //打开压缩包
 $resource = zip_open($filename);
 $i = 1;
 //遍历读取压缩包里面的一个个文件
 while ($dir_resource = zip_read($resource)) {
  //如果能打开则继续
  if (zip_entry_open($resource,$dir_resource)) {
   //获取当前项目的名称,即压缩包里面当前对应的文件名
   $file_name = $path.zip_entry_name($dir_resource);
   //以最后一个“/”分割,再用字符串截取出路径部分
   $file_path = substr($file_name,0,strrpos($file_name, "/"));
   //如果路径不存在,则创建一个目录,true表示可以创建多级目录
   if(!is_dir($file_path)){
    mkdir($file_path,0777,true);
   }
   //如果不是目录,则写入文件
   if(!is_dir($file_name)){
    //读取这个文件
    $file_size = zip_entry_filesize($dir_resource);
    //最大读取6M,如果文件过大,跳过解压,继续下一个
    if($file_size     $file_content = zip_entry_read($dir_resource,$file_size);
     file_put_contents($file_name,$file_content);
    }else{
     echo "

".$i++." 此文件已被跳过,原因:文件过大, -> ".iconv("gb2312","utf-8",$file_name)."

";
    }
   }
   //关闭当前
   zip_entry_close($dir_resource);
  }
 }
 //关闭压缩包
 zip_close($resource); 
 $endtime = explode(' ',microtime()); //解压结束的时间
 $thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
 $thistime = round($thistime,3); //保留3为小数
 echo "

解压完毕!,本次解压花费:$thistime 秒。

";
}

$size = get_zip_originalsize('20131101.zip','temp/');

?>

测试解压了一个300多KB的小文件,花了0.115秒,测试解压了一个30多MB的(网页文件,小文件比较多),花了20多秒。

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