zlib 文件操作

<?php
//Extracting the content of a gzip file in php and creating a new csv file using the content
//Create a folder uploads inside current folder
$local_file    =    'test.gz';

//To Get the size of the uncompressed file
$FileRead = $local_file;
$FileOpen = fopen($FileRead, "rb");
fseek($FileOpen, -4, SEEK_END);
$buf = fread($FileOpen, 4);
$GZFileSize = end(unpack("V", $buf));
fclose($FileOpen);
//To Get the size of the zip file

$fzip_size    =    $GZFileSize;
   
$filename    =    $local_file;
$ext        =    pathinfo($filename,PATHINFO_EXTENSION);   
$file_name    =    pathinfo($filename,PATHINFO_FILENAME);       
$file_name    =    $file_name.".csv";

$zd         =     gzopen($filename, "rb");
$contents     =     gzread($zd, $fzip_size);
gzclose($zd);
$file_name    =    "uploads/".$file_name;
$fp    =    fopen($file_name, "wb");
fwrite($fp, $contents); //write contents of feed to cache file
fclose($fp);
if(file_exists($file_name))
{
    chmod($file_name,0755);
    unlink($local_file);
}
?>