Two ways to turn on gzip compression in PHP Web programs

Gzip is a kind of network data compression transmission technique, can let our bandwidth save about 70%, can greatly speed up the page opening speed, not only benefit the user experience, also can save a lot of bandwidth. General Apache, Nginx and so on in the configuration file can open the Gzip service. Let's talk about how to turn on the gzip compression service in the PHP Web program:

The first type of gzip compression scheme

1. Add the following code to the. htaccess:

#这是添加你要压缩的类型  

2, gzip.php, the code is as follows:

  
   






break;  Scutephp.com







Break

?>

The second type of gzip compression scheme

This option is an upgraded version of Gzip that caches compressed files of gzip and avoids duplication of compression,

1. Add in. htaccess:

Htaccess rewriterule (. *.css$|. *.js$) gzip.php?$1 [L],

The code is as follows:

 
   
Htaccess
Rewriterule (. *.css$|. *.js$) gzip.php?$1 [L]//Project Root Path
Define (' Abspath ', DirName (__file__). ' /'); GZIP compression switch
$cache = true; directory where GZ files are stored, ensuring writable
$cachedir = ' gzip-cache/';
if (!is_dir (Abspath. $cachedir)) {
mkdir (Abspath. $cachedir); }//Determine if gzip support is supported
$gzip = strstr ($_server[' http_accept_encoding '), ' gzip ');
$deflate = strstr ($_server[' http_accept_encoding '), ' deflate '); See if the browser supports gzip otherwise it's deflate and none
$encoding = $gzip? ' gzip ': ($deflate? ' Deflate ': ' None ');
if (!isset ($_server[' query_string ')) exit ();
$key =array_shift (Explode ('? ', $_server[' query_string '));
$key =str_replace ('.. /', ", $key);
$key =basename ($_server[' query_string '); Absolute path to File
$filename =abspath.$_server[' query_string '];
$symbol = ' ^ '; $rel _path=str_replace (Abspath, ", DirName ($filename));
$namespace =str_replace ('/', $symbol, $rel _path);
$cache _filename=abspath. $cachedir. $namespace. $symbol. basename ($filename). GZ ';//Generate GZ file path
$type = "content-type:text/html"; The default type information
$pathInfo = PathInfo ($filename); Determine file type information by suffix
$ext = $pathInfo [' extension '];
Switch ($ext) {
Case ' CSS ':
$type = "Content-type:text/css"; Break Case ' JS ':
$type = "Content-type:text/javascript";
Break
Default
Exit ();
}
if ($cache) {
if (file_exists ($cache _filename)) {//If there is a GZ file
$mtime = Filemtime ($cache _filename);
$gmt _mtime = gmdate (' d, D M Y h:i:s ', $mtime). ' GMT '; Read GZ file output
$content = file_get_contents ($cache _filename);
Header ("last-modified:".) $gmt _mtime);
Header ("Expires:"); Header ("Cache-control:");
Header ("Pragma:");
Header ($type);
Header ("Tips:normal Respond (Gzip)");
Header ("Content-encoding:gzip");
Echo $content;
}else if (file_exists ($filename)) {//does not have a corresponding GZ file
$mtime = Mktime ();
$gmt _mtime = gmdate (' d, D M Y h:i:s ', $mtime). ' GMT ';
$content = file_get_contents ($filename);//Read file
$content = Gzencode ($content, 9, $gzip? force_gzip:force_deflate);//Compress file contents
Header ("last-modified:".) $gmt _mtime);
Header ("Expires:");
Header ("Cache-control:");
Header ("Pragma:");
Header ($type);
Header ("Tips:build gzip File (gzip)"); Header ("content-encoding:".) $encoding);
Header (' Content-length: '. strlen ($content)); if ($fp = fopen ($cache _filename, ' W ')) {//write GZ file for next use
Fwrite ($fp, $content); Fclose ($FP);
}
Echo $content;
}else{
Header ("http/1.0 404 Not Found");
}
}else {//processing does not use the output in gzip mode. The basic principle of the above if (File_exists ($filename)) {
$mtime = Filemtime ($filename);
$gmt _mtime = gmdate (' d, D M Y h:i:s ', $mtime). ' GMT ';
Header ("last-modified:".) $gmt _mtime);
Header ("Expires:");
Header ("Cache-control:");
Header ("Pragma:");
Header ($type);
Header ("Tips:normal Respond");
$content = ReadFile ($filename);
Echo $content;
}else {
Header ("http/1.0 404 Not Found");
}
}
?>

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