php实现zip压缩文件解压缩代码分享(简单易懂)_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。
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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