init blog
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<?php
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if ( !function_exists( 'wp_get_document_title' ) ) :
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/**
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* 获取网页标题
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*
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* @since Beginning 4.0.1
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* @since WordPress 4.4.0
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*
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* 回顾了下历史代码，在 WordPress 4.1 之后，添加 `wp_get_document_title()` 之前，
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* `wp_title()` 函数会在支持 `title-tag` 特性的主题中对标题进行特殊处理，使其返回
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* 值与现在的 `wp_get_document_title()` 函数类似。现在 `wp_title()` 又回到了 4.1
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* 之前的状态，但是考虑此函数只会在有特殊处理的版本中发挥作用，所以无需我们再进行
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* 处理。
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*/
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function wp_get_document_title() {
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return wp_title( '|', false, 'right' );
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}
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endif;
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if ( !function_exists( 'wp_doing_ajax' ) ) :
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/**
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* 检测当前是否为 WordPress AJAX 请求
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*
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* @since Beginning 4.0.1
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* @since WordPress 4.7.0
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*/
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function wp_doing_ajax() {
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return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
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}
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endif;
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if ( !function_exists( 'apply_filters_deprecated' ) ) :
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/**
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* 应用过时的过滤器
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*
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* @since Beginning 4.0.1
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* @since WordPress 4.6.0
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*
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* @see _deprecated_hook()
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*/
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function apply_filters_deprecated( $tag, $args, $version, $replacement = false, $message = null ) {
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if ( !has_filter( $tag ) )
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return $args[0];
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_deprecated_hook( $tag, $version, $replacement, $message );
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return apply_filters_ref_array( $tag, $args );
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}
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endif;
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if ( !function_exists( '_deprecated_hook' ) ) :
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/**
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* 抛出使用过时钩子的通知
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*
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* @since Beginning 4.0.1
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* @since WordPress 4.6.0
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*
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* @access private
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*/
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function _deprecated_hook( $hook, $version, $replacement = null, $message = null ) {
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do_action(
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'deprecated_hook_run',
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$hook,
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$replacement,
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$version,
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$message
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);
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if ( !WP_DEBUG || !apply_filters( 'deprecated_hook_trigger_error', true ) )
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return;
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$message = empty( $message ) ? '' : ' ' . $message;
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if ( is_null( $replacement ) )
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trigger_error( sprintf(
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__( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ),
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$hook,
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$version
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) . $message );
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else
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trigger_error( sprintf(
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__( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ),
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$hook,
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$version,
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$replacement
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) . $message );
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}
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endif;
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if ( !function_exists( 'do_action_deprecated' ) ) :
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/**
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* 运行过时的动作钩子
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*
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* @since Beginning 4.0.2
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* @since WordPress 4.6.0
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*
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* @see _deprecated_hook()
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*/
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function do_action_deprecated( $tag, $args, $version, $replacement = false, $message = null ) {
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if ( !has_action( $tag ) )
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return;
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_deprecated_hook( $tag, $version, $replacement, $message );
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do_action_ref_array( $tag, $args );
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}
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endif;
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if ( !function_exists( 'spl_autoload_register' ) ) :
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/**
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* SPL 队列
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*
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* @var array
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*/
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global $_wp_spl_autoloaders;
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$_wp_spl_autoloaders = array();
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/**
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* 自动加载
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*
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* 为了兼容 PHP 5.2，利用自动加载来实现 SPL 系统，这里在调用不存在的类
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* 时会自动循环已注册的回调函数来按需加载类文件。
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*
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* @since Beginning 4.0.5
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* @since WordPress 4.6.0
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*/
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function __autoload( $classname ) {
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foreach ( $GLOBALS['_wp_spl_autoloaders'] as $autoloader ) {
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if ( !is_callable( $autoloader ) )
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continue;
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call_user_func( $autoloader, $classname );
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if ( class_exists( $classname, false ) )
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return;
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}
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}
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/**
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* 注册回调函数到 SPL 队列
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*
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* @since Beginning 4.0.5
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* @since WordPress 4.6.0
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*
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* @see __autoload()
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*/
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function spl_autoload_register( $autoload_function, $throw = true, $prepend = false ) {
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if ( $throw && !is_callable( $autoload_function ) )
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throw new Exception( 'Function not callable' );
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global $_wp_spl_autoloaders;
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if ( in_array( $autoload_function, $_wp_spl_autoloaders ) )
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return;
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if ( $prepend )
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array_unshift( $_wp_spl_autoloaders, $autoload_function );
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else
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$_wp_spl_autoloaders[] = $autoload_function;
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}
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/**
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* 从 SPL 队列注销回调函数
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*
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* @since Beginning 4.0.5
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* @since WordPress 4.6.0
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*
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* @see __autoload()
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* @see spl_autoload_register()
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*/
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function spl_autoload_unregister( $function ) {
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foreach ( $GLOBALS['_wp_spl_autoloaders'] as &$autoloader ) {
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if ( $autoloader !== $function )
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continue;
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unset( $autoloader );
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return true;
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}
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return false;
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}
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/**
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* 获取 SPL 队列的所有回调函数
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*
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* @since Beginning 4.0.5
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* @since WordPress 4.6.0
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*
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* @see __autoload()
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* @see spl_autoload_register()
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*/
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function spl_autoload_functions() {
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return $GLOBALS['_wp_spl_autoloaders'];
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}
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endif;
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if ( !function_exists( 'get_user_locale' ) ) :
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/**
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* 获取用户语言
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*
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* @since Beginning 4.0.5
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* @since WordPress 4.7.0
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*/
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function get_user_locale() {
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return get_locale();
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}
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endif;
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// End of page.
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