install_plugin_information ( No parameters )
install_plugin_information: 这个函数用来检索关于一个WordPress插件的信息,给定它的slug或文件名。
以对话框的形式显示插件信息。
function install_plugin_information() { global $tab; if ( empty( $_REQUEST['plugin'] ) ) { return; } $api = plugins_api( 'plugin_information', array( 'slug' => wp_unslash( $_REQUEST['plugin'] ), ) ); if ( is_wp_error( $api ) ) { wp_die( $api ); } $plugins_allowedtags = array( 'a' => array( 'href' => array(), 'title' => array(), 'target' => array(), ), 'abbr' => array( 'title' => array() ), 'acronym' => array( 'title' => array() ), 'code' => array(), 'pre' => array(), 'em' => array(), 'strong' => array(), 'div' => array( 'class' => array() ), 'span' => array( 'class' => array() ), 'p' => array(), 'br' => array(), 'ul' => array(), 'ol' => array(), 'li' => array(), 'h1' => array(), 'h2' => array(), 'h3' => array(), 'h4' => array(), 'h5' => array(), 'h6' => array(), 'img' => array( 'src' => array(), 'class' => array(), 'alt' => array(), ), 'blockquote' => array( 'cite' => true ), ); $plugins_section_titles = array( 'description' => _x( 'Description', 'Plugin installer section title' ), 'installation' => _x( 'Installation', 'Plugin installer section title' ), 'faq' => _x( 'FAQ', 'Plugin installer section title' ), 'screenshots' => _x( 'Screenshots', 'Plugin installer section title' ), 'changelog' => _x( 'Changelog', 'Plugin installer section title' ), 'reviews' => _x( 'Reviews', 'Plugin installer section title' ), 'other_notes' => _x( 'Other Notes', 'Plugin installer section title' ), ); // Sanitize HTML. foreach ( (array) $api->sections as $section_name => $content ) { $api->sections[ $section_name ] = wp_kses( $content, $plugins_allowedtags ); } foreach ( array( 'version', 'author', 'requires', 'tested', 'homepage', 'downloaded', 'slug' ) as $key ) { if ( isset( $api->$key ) ) { $api->$key = wp_kses( $api->$key, $plugins_allowedtags ); } } $_tab = esc_attr( $tab ); // Default to the Description tab, Do not translate, API returns English. $section = isset( $_REQUEST['section'] ) ? wp_unslash( $_REQUEST['section'] ) : 'description'; if ( empty( $section ) || ! isset( $api->sections[ $section ] ) ) { $section_titles = array_keys( (array) $api->sections ); $section = reset( $section_titles ); } iframe_header( __( 'Plugin Installation' ) ); $_with_banner = ''; if ( ! empty( $api->banners ) && ( ! empty( $api->banners['low'] ) || ! empty( $api->banners['high'] ) ) ) { $_with_banner = 'with-banner'; $low = empty( $api->banners['low'] ) ? $api->banners['high'] : $api->banners['low']; $high = empty( $api->banners['high'] ) ? $api->banners['low'] : $api->banners['high']; ?> <style type="text/css"> #plugin-information-title.with-banner { background-image: url( <?php echo esc_url( $low ); ?> ); } @media only screen and ( -webkit-min-device-pixel-ratio: 1.5 ) { #plugin-information-title.with-banner { background-image: url( <?php echo esc_url( $high ); ?> ); } } </style> <?php } echo '<div id="plugin-information-scrollable">'; echo "<div id='{$_tab}-title' class='{$_with_banner}'><div class='vignette'></div><h2>{$api->name}</h2></div>"; echo "<div id='{$_tab}-tabs' class='{$_with_banner}'>n"; foreach ( (array) $api->sections as $section_name => $content ) { if ( 'reviews' === $section_name && ( empty( $api->ratings ) || 0 === array_sum( (array) $api->ratings ) ) ) { continue; } if ( isset( $plugins_section_titles[ $section_name ] ) ) { $title = $plugins_section_titles[ $section_name ]; } else { $title = ucwords( str_replace( '_', ' ', $section_name ) ); } $class = ( $section_name === $section ) ? ' class="current"' : ''; $href = add_query_arg( array( 'tab' => $tab, 'section' => $section_name, ) ); $href = esc_url( $href ); $san_section = esc_attr( $section_name ); echo "t<a name='$san_section' href='$href' $class>$title</a>n"; } echo "</div>n"; ?> <div id="<?php echo $_tab; ?>-content" class='<?php echo $_with_banner; ?>'> <div class="fyi"> <ul> <?php if ( ! empty( $api->version ) ) { ?> <li><strong><?php _e( 'Version:' ); ?></strong> <?php echo $api->version; ?></li> <?php } if ( ! empty( $api->author ) ) { ?> <li><strong><?php _e( 'Author:' ); ?></strong> <?php echo links_add_target( $api->author, '_blank' ); ?></li> <?php } if ( ! empty( $api->last_updated ) ) { ?> <li><strong><?php _e( 'Last Updated:' ); ?></strong> <?php /* translators: %s: Human-readable time difference. */ printf( __( '%s ago' ), human_time_diff( strtotime( $api->last_updated ) ) ); ?> </li> <?php } if ( ! empty( $api->requires ) ) { ?> <li> <strong><?php _e( 'Requires WordPress Version:' ); ?></strong> <?php /* translators: %s: Version number. */ printf( __( '%s or higher' ), $api->requires ); ?> </li> <?php } if ( ! empty( $api->tested ) ) { ?> <li><strong><?php _e( 'Compatible up to:' ); ?></strong> <?php echo $api->tested; ?></li> <?php } if ( ! empty( $api->requires_php ) ) { ?> <li> <strong><?php _e( 'Requires PHP Version:' ); ?></strong> <?php /* translators: %s: Version number. */ printf( __( '%s or higher' ), $api->requires_php ); ?> </li> <?php } if ( isset( $api->active_installs ) ) { ?> <li><strong><?php _e( 'Active Installations:' ); ?></strong> <?php if ( $api->active_installs >= 1000000 ) { $active_installs_millions = floor( $api->active_installs / 1000000 ); printf( /* translators: %s: Number of millions. */ _nx( '%s+ Million', '%s+ Million', $active_installs_millions, 'Active plugin installations' ), number_format_i18n( $active_installs_millions ) ); } elseif ( $api->active_installs < 10 ) { _ex( 'Less Than 10', 'Active plugin installations' ); } else { echo number_format_i18n( $api->active_installs ) . '+'; } ?> </li> <?php } if ( ! empty( $api->slug ) && empty( $api->external ) ) { ?> <li><a target="_blank" href="<?php echo esc_url( __( 'https://wordpress.org/plugins/' ) . $api->slug ); ?>/"><?php _e( 'WordPress.org Plugin Page »' ); ?></a></li> <?php } if ( ! empty( $api->homepage ) ) { ?> <li><a target="_blank" href="<?php echo esc_url( $api->homepage ); ?>"><?php _e( 'Plugin Homepage »' ); ?></a></li> <?php } if ( ! empty( $api->donate_link ) && empty( $api->contributors ) ) { ?> <li><a target="_blank" href="<?php echo esc_url( $api->donate_link ); ?>"><?php _e( 'Donate to this plugin »' ); ?></a></li> <?php } ?> </ul> <?php if ( ! empty( $api->rating ) ) { ?> <h3><?php _e( 'Average Rating' ); ?></h3> <?php wp_star_rating( array( 'rating' => $api->rating, 'type' => 'percent', 'number' => $api->num_ratings, ) ); ?> <p aria-hidden="true" class="fyi-description"> <?php printf( /* translators: %s: Number of ratings. */ _n( '(based on %s rating)', '(based on %s ratings)', $api->num_ratings ), number_format_i18n( $api->num_ratings ) ); ?> </p> <?php } if ( ! empty( $api->ratings ) && array_sum( (array) $api->ratings ) > 0 ) { ?> <h3><?php _e( 'Reviews' ); ?></h3> <p class="fyi-description"><?php _e( 'Read all reviews on WordPress.org or write your own!' ); ?></p> <?php foreach ( $api->ratings as $key => $ratecount ) { // Avoid div-by-zero. $_rating = $api->num_ratings ? ( $ratecount / $api->num_ratings ) : 0; $aria_label = esc_attr( sprintf( /* translators: 1: Number of stars (used to determine singular/plural), 2: Number of reviews. */ _n( 'Reviews with %1$d star: %2$s. Opens in a new tab.', 'Reviews with %1$d stars: %2$s. Opens in a new tab.', $key ), $key, number_format_i18n( $ratecount ) ) ); ?> <div class="counter-container"> <span class="counter-label"> <?php printf( '<a href="%s" target="_blank" aria-label="%s">%s</a>', "https://wordpress.org/support/plugin/{$api->slug}/reviews/?filter={$key}", $aria_label, /* translators: %s: Number of stars. */ sprintf( _n( '%d star', '%d stars', $key ), $key ) ); ?> </span> <span class="counter-back"> <span class="counter-bar" style="width: <?php echo 92 * $_rating; ?>px;"></span> </span> <span class="counter-count" aria-hidden="true"><?php echo number_format_i18n( $ratecount ); ?></span> </div> <?php } } if ( ! empty( $api->contributors ) ) { ?> <h3><?php _e( 'Contributors' ); ?></h3> <ul class="contributors"> <?php foreach ( (array) $api->contributors as $contrib_username => $contrib_details ) { $contrib_name = $contrib_details['display_name']; if ( ! $contrib_name ) { $contrib_name = $contrib_username; } $contrib_name = esc_html( $contrib_name ); $contrib_profile = esc_url( $contrib_details['profile'] ); $contrib_avatar = esc_url( add_query_arg( 's', '36', $contrib_details['avatar'] ) ); echo "<li><a href='{$contrib_profile}' target='_blank'><img src='{$contrib_avatar}' width='18' height='18' alt='' />{$contrib_name}</a></li>"; } ?> </ul> <?php if ( ! empty( $api->donate_link ) ) { ?> <a target="_blank" href="<?php echo esc_url( $api->donate_link ); ?>"><?php _e( 'Donate to this plugin »' ); ?></a> <?php } ?> <?php } ?> </div> <div id="section-holder"> <?php $requires_php = isset( $api->requires_php ) ? $api->requires_php : null; $requires_wp = isset( $api->requires ) ? $api->requires : null; $compatible_php = is_php_version_compatible( $requires_php ); $compatible_wp = is_wp_version_compatible( $requires_wp ); $tested_wp = ( empty( $api->tested ) || version_compare( get_bloginfo( 'version' ), $api->tested, '<=' ) ); if ( ! $compatible_php ) { echo '<div class="notice notice-error notice-alt"><p>'; _e( '<strong>Error:</strong> This plugin <strong>requires a newer version of PHP</strong>.' ); if ( current_user_can( 'update_php' ) ) { printf( /* translators: %s: URL to Update PHP page. */ ' ' . __( '<a href="%s" target="_blank">Click here to learn more about updating PHP</a>.' ), esc_url( wp_get_update_php_url() ) ); wp_update_php_annotation( '</p><p><em>', '</em>' ); } else { echo '</p>'; } echo '</div>'; } if ( ! $tested_wp ) { echo '<div class="notice notice-warning notice-alt"><p>'; _e( '<strong>Warning:</strong> This plugin <strong>has not been tested</strong> with your current version of WordPress.' ); echo '</p></div>'; } elseif ( ! $compatible_wp ) { echo '<div class="notice notice-error notice-alt"><p>'; _e( '<strong>Error:</strong> This plugin <strong>requires a newer version of WordPress</strong>.' ); if ( current_user_can( 'update_core' ) ) { printf( /* translators: %s: URL to WordPress Updates screen. */ ' ' . __( '<a href="%s" target="_parent">Click here to update WordPress</a>.' ), esc_url( self_admin_url( 'update-core.php' ) ) ); } echo '</p></div>'; } foreach ( (array) $api->sections as $section_name => $content ) { $content = links_add_base_url( $content, 'https://wordpress.org/plugins/' . $api->slug . '/' ); $content = links_add_target( $content, '_blank' ); $san_section = esc_attr( $section_name ); $display = ( $section_name === $section ) ? 'block' : 'none'; echo "t<div id='section-{$san_section}' class='section' style='display: {$display};'>n"; echo $content; echo "t</div>n"; } echo "</div>n"; echo "</div>n"; echo "</div>n"; // #plugin-information-scrollable echo "<div id='$tab-footer'>n"; if ( ! empty( $api->download_link ) && ( current_user_can( 'install_plugins' ) || current_user_can( 'update_plugins' ) ) ) { $status = install_plugin_install_status( $api ); switch ( $status['status'] ) { case 'install': if ( $status['url'] ) { if ( $compatible_php && $compatible_wp ) { echo '<a data-slug="' . esc_attr( $api->slug ) . '" id="plugin_install_from_iframe" class="button button-primary right" href="' . $status['url'] . '" target="_parent">' . __( 'Install Now' ) . '</a>'; } else { printf( '<button type="button" class="button button-primary button-disabled right" disabled="disabled">%s</button>', _x( 'Cannot Install', 'plugin' ) ); } } break; case 'update_available': if ( $status['url'] ) { if ( $compatible_php ) { echo '<a data-slug="' . esc_attr( $api->slug ) . '" data-plugin="' . esc_attr( $status['file'] ) . '" id="plugin_update_from_iframe" class="button button-primary right" href="' . $status['url'] . '" target="_parent">' . __( 'Install Update Now' ) . '</a>'; } else { printf( '<button type="button" class="button button-primary button-disabled right" disabled="disabled">%s</button>', _x( 'Cannot Update', 'plugin' ) ); } } break; case 'newer_installed': /* translators: %s: Plugin version. */ echo '<a class="button button-primary right disabled">' . sprintf( __( 'Newer Version (%s) Installed' ), esc_html( $status['version'] ) ) . '</a>'; break; case 'latest_installed': echo '<a class="button button-primary right disabled">' . __( 'Latest Version Installed' ) . '</a>'; break; } } echo "</div>n"; iframe_footer(); exit; }
要使用` get_users
`函数获取所有用户列表,可以按照以下步骤进行:
1. 使用` get_users
`函数调用获取用户列表:
$users = get_users();
2. 您可以按需使用参数来过滤结果。例如,您可以通过角色、用户ID、用户登录名等过滤用户列表。以下是一个根据用户角色为过滤条件的示例:
$users = get_users( array( 'role' => 'subscriber' // 将角色名称替换为您要过滤的角色 ) );
在上述示例中,将` role
`参数设置为所需的角色名称来过滤用户列表。
3. 您可以使用循环遍历获取的用户列表,并访问每个用户的属性。例如,以下示例将显示每个用户的用户名和电子邮件地址:
foreach( $users as $user ) { echo '用户名:' . $user->user_login . ', 电子邮件:' . $user->user_email . ; }
在上述示例中,通过` $user->user_login
`和` $user->user_email
`访问每个用户的用户名和电子邮件地址。
请注意,` get_users
`函数默认返回所有用户,并可以根据需要使用更多参数进行过滤。您可以参阅WordPress官方文档中的` get_users
`函数文档,了解更多可用参数和用法示例。
总结起来,使用` get_users
`函数获取所有用户列表的步骤是:
get_users
`函数获取用户列表。在WordPress中,可以使用WP_PLUGIN_DIR和WP_PLUGIN_URL常量来定义插件的目录路径和URL。
1. `WP_PLUGIN_DIR`:这是一个常量,用于定义插件的目录路径(文件系统路径)。您可以使用以下代码在插件文件中访问该常量:
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
在上述代码中,将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量,您可以获取插件文件的完整路径。
2. `WP_PLUGIN_URL`:这是一个常量,用于定义插件的URL(用于在网页上访问插件文件)。以下是一个使用该常量的示例:
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
同样,请将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量,您可以获取插件在网页上的完整URL。
请注意,`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量在WordPress版本2.6之后引入。从WordPress 5.5版本开始,这两个常量被标记为过时(deprecated),因为WordPress更倾向于使用新的插件文件结构。如果您正在开发新插件,建议使用新的插件文件结构和相关函数。
在新的插件文件结构中,可以使用以下函数来获取插件的目录路径和URL:
- `plugin_dir_path()`:获取插件目录路径。
- `plugin_dir_url()`:获取插件URL。
这些函数会自动将插件的版本、多站点和SSL等考虑因素纳入计算。
总结起来,使用`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量定义插件的目录和URL的方法是:
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/'; $plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
但请注意,这两个常量已被标记为过时,建议使用新的插件文件结构和相关函数来获取插件的路径和URL。
使用PHP在WordPress中添加自定义功能可以通过以下方式实现:
下面是一个实操示例。
要在WordPress中添加自定义功能,可以按照以下步骤使用PHP编写并添加自定义功能:
// 添加自定义功能示例 // 1. 创建自定义短代码 function custom_shortcode() { return '这是我的自定义短代码内容'; } add_shortcode('custom', 'custom_shortcode'); // 2. 自定义小工具 function custom_widget() { echo '这是我的自定义小工具内容'; } register_widget('custom_widget'); // 3. 自定义菜单 function custom_menu() { register_nav_menu('custom-menu', '自定义菜单'); } add_action('after_setup_theme', 'custom_menu'); // 4. 自定义页面模板 function custom_page_template() { /* Template Name: 自定义模板 */ // 自定义模板的内容和样式 }
请注意,修改主题文件可以在主题更新时丢失,因此建议在进行任何更改之前备份functions.php文件。此外,为避免不必要的错误和冲突,建议在添加自定义功能前先了解WordPress开发文档和最佳实践,以确保正确、安全地实现所需的自定义功能。
使用 do_action
函数可以触发一个钩子函数。do_action
函数的参数与要触发的钩子函数的参数相同。
例如,触发save_post钩子函数的代码如下:
do_action( 'save_post', $post_ID, $post );
这里,$post_ID
和 $post
是传递给钩子函数的参数。
使用 wp_get_current_user
获取当前登录用户的信息:
$current_user = wp_get_current_user(); // 获取当前用户的ID $user_id = $current_user->ID; // 获取当前用户的用户名 $user_login = $current_user->user_login; // 获取当前用户的邮箱 $user_email = $current_user->user_email; // 获取当前用户的显示名称 $display_name = $current_user->display_name;