flush_rewrite_rules() 函数用来删除然后根据现有的条件重写伪静态规则,也就是刷新一次伪静态规则了。
先来说一下,通常在主题或者插件添加新的自定义文章类型的时候调用,防止新的自定义文章类型的文章出现 404 的情况,或者很多时候我们都需要在主题启用的时候执行一些代码,比如布置一些数据库表单、跳转到设置页面等等,WordPress 本身并没有提供相关的钩子,网上也有很多五花八门的实现方法,经过我的研究,发现了可能是最优的方法,下边分享给大家:
/** *WordPress 在主题启用的时候执行一些代码 *http://www.endskin.com/theme-activation-action/ */ function Bing_theme_activation(){ if( $GLOBALS['pagenow'] != 'themes.php' || !isset( $_GET['activated'] ) ) return; /* 这里就可以放置在主题启用的时候要执行的代码了,比如跳转到设置界面: wp_redirect( admin_url( 'options-general.php' ) );//注意修改页面地址 die; */ } add_action( 'load-themes.php', 'Bing_theme_activation' );
此代码放在主题和插件里都是有效的。
另外要注意,更新伪静态规则是非常消耗时间和效率的,所以不要每次执行代码都调用,只在必要的情况调用(比如启用主题和启用插件),把 flush_rewrite_rules() 挂到 init 钩子上是极其不正确的。
用法
flush_rewrite_rules( $hard );
参数
$hard
(布尔)(可选)如果为 True 则一起刷新 .htaccess 文件(hard flush);为 False 则只更新数据库里的伪静态规则(soft flush)。
默认值:True(hard flush)。
例子
在主题启用的时候更新伪静态规则:
function Bing_theme_activation(){ if( $GLOBALS['pagenow'] != 'themes.php' || !isset( $_GET['activated'] ) ) return; flush_rewrite_rules(); } add_action( 'load-themes.php', 'Bing_theme_activation' );
在插件启用的时候更新伪静态规则:
function Bing_myplugin_activate(){ flush_rewrite_rules(); } register_activation_hook( __FILE__, 'Bing_myplugin_activate' );
其它
此函数位于:wp-includes/rewrite.php

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