php实现的css更新类

2. /** css 更新类,更新css文件内图片的版本
3. * Date: 2013-02-05
4. * Author: fdipzone
5. * Ver: 1.1
6. * Edit: bbs.it-home.org
7. * Func:
8. * update();
9. *
10. * Ver: 1.1 增加search_child参数,可遍历子文件夹
11. */
13. class CSSUpdate{
14. private $csstmpl_path = null;
15. private $css_path = null;
16. private $replacetags = array();
17. private $search_child = false;
18. private $convert_num = 0;
19. private $is_ready = 0;
21. /** 初始化
22. * @param String $csstmpl_path css模版路径
23. * @param String $css_path css目标路径
24. * @param Array $replacetags 需要替换的图片类型
25. * @param boolean $search_child 是否遍历子文件夹,默认false
26. */
27. public function __construct($csstmpl_path, $css_path, $replacetags=array(), $search_child=false){
28. if(!is_dir($csstmpl_path) || !is_dir($css_path) || !$replacetags){
29. $this->is_ready = 0;
30. }else{
31. $this->csstmpl_path = $csstmpl_path;
32. $this->css_path = $css_path;
33. $this->replacetags = $replacetags;
34. $this->search_child = $search_child;
35. $this->is_ready = 1;
36. }
37. }
39. /** 更新css文件 */
40. public function update(){
41. if($this->is_ready==0){
42. $this->response('csstmpl or csspath or replacetags error');
43. return '';
44. }
45. $this->traversing($this->csstmpl_path);
46. $this->response('covert num:'.$this->convert_num);
47. }
49. /** 遍历文件夹
50. * @param String $path 文件路径
51. */
52. private function traversing($path){
53. $handle = opendir($path);
54. while(($file=readdir($handle))!==false){
55. if($file!='..' && $file!='.'){
56. $curfile = $path.'/'.$file;
58. if(is_dir($curfile)){ // folder
59. if($this->search_child){ // 需要遍历子文件夹
60. $this->traversing($curfile);
61. }
62. }elseif($this->checkExt($curfile)){ // css file
63. $dfile = str_replace($this->csstmpl_path, $this->css_path, $curfile);
64. $this->create($curfile, $dfile);
65. $this->response($curfile.' convert to '.$dfile.' success');
66. $this->convert_num ++;
67. }
68. }
69. }
70. closedir($handle);
71. }
73. /** 检查文件后缀 */
74. private function checkExt($file){
75. $name = basename($file);
76. $namefrag = explode('.', $name);
77. if(count($namefrag)>=2){
78. if(strtolower($namefrag[count($namefrag)-1])=='css'){ // css文件
79. return true;
80. }
81. }
82. return false;
83. }
85. /** 替换模版内容,写入csspath
86. * @param String $tmplfile 模版文件
87. * @param String $dfile 目标文件
88. */
89. private function create($tmplfile, $dfile){
90. $css_content = file_get_contents($tmplfile);
92. foreach($this->replacetags as $tag){
93. $css_content = str_replace($tag, $tag."?".date('YmdHis'), $css_content);
94. }
96. if(!is_dir(dirname($dfile))){ // 生成目标路径
97. mkdir(dirname($dfile), 0755, true);
98. }
100. file_put_contents($dfile, $css_content, true);
101. }
103. /** 输出 */
104. private function response($content){
105. echo $content."
     ";
106. }
107. }
108. ?>

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2，演示示例 demo.php

2. require_once "CSSUpdate.class.php";
4. define('ROOT_PATH', dirname(__FILE__));
6. $css_path = ROOT_PATH.'/css';
7. $csstmpl_path = ROOT_PATH.'/csstmpl';
8. $replacetags = array('.png', '.jpg', '.gif');
10. $cssobj = new CSSUpdate($csstmpl_path, $css_path, $replacetags);
11. $cssobj->update();
12. ?>

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附， php css更新类的源码下载地址。