PHP GZ压缩与解压

 1 /*将字符串添加至GZ文件*/
 2 function gz_str($str,$gz_name){
 3     $fp = gzopen ($gz_name, ‘w9‘);
 4     gzwrite ($fp, $str);
 5     gzclose($fp);    
 6 }
 7 /*将文件添加至GZ文件*/
 8 function gz_file($file,$gz_name){
 9     $fp = gzopen ($gz_name, ‘w9‘);
10     gzwrite ($fp, file_get_contents($file));
11     gzclose($fp);    
12 }
13 /*读取GZ文件*/
14 function read_gz($gz_file){
15     $buffer_size = 4096; // read 4kb at a time
16     $file = gzopen($gz_file, ‘rb‘);
17     $str=‘‘;
18     while(!gzeof($file)) {
19         $str.=gzread($file, $buffer_size);
20     }
21     gzclose($file);
22     return $str;
23 }
24 /*解压GZ文件*/
25 function unzip_gz($gz_file){
26     $buffer_size = 4096; // read 4kb at a time
27     $out_file_name = str_replace(‘.gz‘, ‘‘, $gz_file);
28     $file = gzopen($gz_file, ‘rb‘);
29     $out_file = fopen($out_file_name, ‘wb‘);
30     $str=‘‘;
31     while(!gzeof($file)) {
32         fwrite($out_file, gzread($file, $buffer_size));
33     }
34     fclose($out_file);
35     gzclose($file);
36 }