WordPress程序中函数wp_get_themes()应用

　　WordPress程序中函数wp_get_themes()描述：

　　根据参数返回WP_Theme对象的数组。

　　用法：

　　<?php

　　$all_themes = wp_get_themes();

　　print_r($all_themes);

　　?>

　　参数：

　　$args

　　(array)(可选)用来查询的参数

　　’errors’

　　(mixed)为true时返回有错误的主题，为false时返回没有错误的主题，为null则返回所有主题。默认为false。

　　’allowed’

　　(mixed)（多站点）（真），仅返回站点允许的主题。如果返回False，则仅返回网站不允许的主题。“网站”仅返回网站允许的主题。“网络”仅返回允许网络的主题。如果为Null，则返回所有主题。默认为空。

　　’blog_id’

　　(int)多站点）用于计算允许哪些主题的博客ID。默认为0

　　默认值: array()

　　WordPress程序源文件：

function wp_get_themes( $args = array() ) {    global $wp_theme_directories;     $defaults = array(        'errors'  => false,        'allowed' => null,        'blog_id' => 0,    );    $args     = wp_parse_args( $args, $defaults );     $theme_directories = search_theme_directories();     if ( is_array( $wp_theme_directories ) && count( $wp_theme_directories ) > 1 ) {        // Make sure the current theme wins out, in case search_theme_directories() picks the wrong        // one in the case of a conflict. (Normally, last registered theme root wins.)        $current_theme = get_stylesheet();        if ( isset( $theme_directories[ $current_theme ] ) ) {            $root_of_current_theme = get_raw_theme_root( $current_theme );            if ( ! in_array( $root_of_current_theme, $wp_theme_directories ) ) {                $root_of_current_theme = WP_CONTENT_DIR . $root_of_current_theme;            }            $theme_directories[ $current_theme ]['theme_root'] = $root_of_current_theme;        }    }     if ( empty( $theme_directories ) ) {        return array();    }     if ( is_multisite() && null !== $args['allowed'] ) {        $allowed = $args['allowed'];        if ( 'network' === $allowed ) {            $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_network() );        } elseif ( 'site' === $allowed ) {            $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_site( $args['blog_id'] ) );        } elseif ( $allowed ) {            $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );        } else {            $theme_directories = array_diff_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );        }    }     $themes         = array();    static $_themes = array();     foreach ( $theme_directories as $theme => $theme_root ) {        if ( isset( $_themes[ $theme_root['theme_root'] . '/' . $theme ] ) ) {            $themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ];        } else {            $themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );        }    }     if ( null !== $args['errors'] ) {        foreach ( $themes as $theme => $wp_theme ) {            if ( $wp_theme->errors() != $args['errors'] ) {                unset( $themes[ $theme ] );            }        }    }     return $themes;}