*_action面向Web流，*_filter*面向数据流。add_*是用户用来挂接WordPress预留接口的函数。如果需要自己定义供他人挂接的扩展点，可以使用do_action，apply_filters来部署，通常不是要改造到骨头不会用上它们。
之所以谈到这个话题是因为文件上传类型限制引起的，搜遍整个网络，关于上传及过滤处理的并不多，其中找到一篇中文的博文，作者毫不客气直接修改WordPress内部源码文件。我想WordPress不至于如此吧，于是就产生了下面的代码片段：
(edit: this doesn't work in wordpress 2.2, below code was tested in wordpress 2.0, source: http://www.goudendouche.com)
Ok, now that I've got the custom register and login pages working, I also want a custom profile page. This is done in a different way from the register and login pages, but it's do-able.
First you'll need to make a custom page template for this, so in your theme dir, look for the file called page.php. Make a copy of this, and name it profilepage.php. In the beginning of the file, add the following lines of code:
< ?php /* Template Name: Profilepage */ //Next, look for lines that go like <?php if (have_posts()) : while (have_posts()) : the_post(); ?> ... some php and html code ... |
And replace this whole bit with the following code:
向wp_head()输送html 头代码。
pagenavi插件:HTML HEAD 插入信息
1 2 3 4 5 6 7 | ### Function: Page Navigation CSS add_action('wp_head', 'pagenavi_css'); function pagenavi_css() { echo "\n".'<!-- Start Of Script Generated By WP-PageNavi 2.20 -->'."\n"; echo '<link rel="stylesheet" href="'.get_option('siteurl').'/wp-content/plugins/pagenavi/pagenavi-css.css" type="text/css" media="screen" />'."\n"; echo '<!-- End Of Script Generated By WP-PageNavi 2.20 -->'."\n"; } |
HTML HEAD 插入结果：
1 2 3 | <!-- Start Of Script Generated By WP-PageNavi 2.20 --> <link rel="stylesheet" href="http://www.ericbess.com/ericblog/wp-content/plugins/pagenavi/pagenavi-css.css" type="text/css" media="screen" /> <!-- End Of Script Generated By WP-PageNavi 2.20 --> |
Another DEMO:
1 2 3 4 5 6 7 8 9 | /**************************************************************************** * add_js * > Add the coolcode.js to the footer ****************************************************************************/ function add_js() { echo '<script type="text/javascript" src="' . get_settings('home') . "/wp-content/plugins/coolcode/coolcode.js\"></script>\n"; } |
