本文实例讲述了php使用gzip压缩传输js和css文件的方法。分享给大家供大家参考。具体如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
<?php /** * 完整调用示例: * 1、combine.php?t=j&b=public&fs=jslib.jquery,function * * 该例子调用的是网站根目录下的public/jslib/jquery.js和public/function.js * * 2、combine.php?t=j&fs=jslib.jquery,function * * 该例子调用的是网站根目录下的jslib/jquery.js和function.js * * 3、combine.php?t=c&b=public.css&fs=common,index * * 该例子调用的是网站根目录下的public/css/common.css和public/css/index.css * * 4、combine.php?t=c&fs=css.common * 该例子调用的是网站根目录下的css/common.css * * 注:多个文件名之间用,分隔;只有一个文件名最后不要有, * 用,分隔的多个文件会被压缩进一个文件，一次性传给浏览器 **/ $is_bad_request=false; $cache = true; $doc_root_uri=$_SERVER['DOCUMENT_ROOT'].'/'; $cachedir = $doc_root_uri . 'public/cache'; //文件类型，j为js，c为css $type=isset($_GET['t'])?($_GET['t']=='j'||$_GET['t']=='c'?$_GET['t']:''):''; //存放js和css文件的基目录, 例如:?b=public.js 代表的是/public/js文件夹，出发点是网站根目录 //基目录参数不是必须的，如果有基目录那么这个基目录就会附加在文件名之前 $base =isset($_GET['b'])?($doc_root_uri.str_replace('.','/',$_GET['b'])):$doc_root_uri; //文件名列表，文件名不带后缀名.比如基目录是 //文件名的格式是 :基目录(如果有)+文件包名+文件名 //例如:类型是j, // 文件名public.js.jquery // 如果有基路径且为public， // 那么转换后的文件名就是/public/public/js/jquery.js // 如果没有基路径 // 那么转换后的文件名就是/public/js/jquery.js //多个文件名之间用,分隔 $fs=isset($_GET['fs'])?str_replace('.','/',$_GET['fs']):''; $fs=str_replace(',','.'.($type=='j'?'js,':'css,'),$fs); $fs=$fs.($type=='j'?'.js':'.css'); if($type==''||$fs==''){$is_bad_request=true;} //die($base); if($is_bad_request){header ("HTTP/1.0 503 Not Implemented");} $file_type=$type=='j'?'javascript':'css'; $elements = explode(',',preg_replace('/([^?]*).*/', '\1', $fs)); // Determine last modification date of the files $lastmodified = 0; while (list(,$element) = each($elements)) { $path =$base . '/' . $element; if (($type == 'j' && substr($path, -3) != '.js') || ($type == 'c' && substr($path, -4) != '.css')) { header ("HTTP/1.0 403 Forbidden"); exit; } if (substr($path, 0, strlen($base)) != $base || !file_exists($path)) { header ("HTTP/1.0 404 Not Found"); exit; } $lastmodified = max($lastmodified, filemtime($path)); } // Send Etag hash $hash = $lastmodified . '-' . md5($fs); header ("Etag: \"" . $hash . "\""); if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"') { // Return visit and no modifications, so do not send anything header ("HTTP/1.0 304 Not Modified"); header ("Content-Type: text/" . $file_type); header ('Content-Length: 0'); } else { // First time visit or files were modified if ($cache) { // Determine supported compression method $gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip'); $deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate'); // Determine used compression method $encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none'); // Check for buggy versions of Internet Explorer if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') && preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) { $version = floatval($matches[1]); if ($version < 6) $encoding = 'none'; if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1')) $encoding = 'none'; } // Try the cache first to see if the combined files were already generated $cachefile = 'cache-' . $hash . '.' . $file_type . ($encoding != 'none' ? '.' . $encoding : ''); if (file_exists($cachedir . '/' . $cachefile)) { if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) { if ($encoding != 'none') { header ("Content-Encoding: " . $encoding); } header ("Content-Type: text/" . $file_type); header ("Content-Length: " . filesize($cachedir . '/' . $cachefile)); fpassthru($fp); fclose($fp); exit; } } } // Get contents of the files $contents = ''; reset($elements); while (list(,$element) = each($elements)) { $path = $base . '/' . $element; $contents .= "\n\n" . file_get_contents($path); } // Send Content-Type header ("Content-Type: text/" . $file_type); if (isset($encoding) && $encoding != 'none') { // Send compressed contents $contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE); header ("Content-Encoding: " . $encoding); header ('Content-Length: ' . strlen($contents)); echo $contents; } else { // Send regular contents header ('Content-Length: ' . strlen($contents)); echo $contents; } // Store cache if ($cache) { if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) { fwrite($fp, $contents); fclose($fp); } } } |
希望本文所述对大家的php程序设计有所帮助。
