
WordPress钩子详解:如何使用动作、过滤器和自定义钩子
add_menu_page ( $page_title, $menu_title, $capability, $menu_slug, $callback = '', $icon_url = '', $position = null )
add_menu_page: 这个函数在WordPress管理菜单中创建一个新的顶级菜单项。你可以用它来创建一个自定义的仪表盘页面或设置页面,例如。
添加一个顶层菜单页。
这个函数接受一个权限,这个权限将被用来决定一个页面是否被包含在菜单中。
钩住处理页面输出的函数必须检查用户是否具有所需的权限。
function add_menu_page( $page_title, $menu_title, $capability, $menu_slug, $callback = '', $icon_url = '', $position = null ) { global $menu, $admin_page_hooks, $_registered_pages, $_parent_pages; $menu_slug = plugin_basename( $menu_slug ); $admin_page_hooks[ $menu_slug ] = sanitize_title( $menu_title ); $hookname = get_plugin_page_hookname( $menu_slug, '' ); if ( ! empty( $callback ) && ! empty( $hookname ) && current_user_can( $capability ) ) { add_action( $hookname, $callback ); } if ( empty( $icon_url ) ) { $icon_url = 'dashicons-admin-generic'; $icon_class = 'menu-icon-generic '; } else { $icon_url = set_url_scheme( $icon_url ); $icon_class = ''; } $new_menu = array( $menu_title, $capability, $menu_slug, $page_title, 'menu-top ' . $icon_class . $hookname, $hookname, $icon_url ); if ( null !== $position && ! is_numeric( $position ) ) { _doing_it_wrong( __FUNCTION__, sprintf( /* translators: %s: add_menu_page() */ __( 'The seventh parameter passed to %s should be numeric representing menu position.' ), '<code>add_menu_page()</code>' ), '6.0.0' ); $position = null; } if ( null === $position || ! is_numeric( $position ) ) { $menu[] = $new_menu; } elseif ( isset( $menu[ (string) $position ] ) ) { $collision_avoider = base_convert( substr( md5( $menu_slug . $menu_title ), -4 ), 16, 10 ) * 0.00001; $position = (string) ( $position + $collision_avoider ); $menu[ $position ] = $new_menu; } else { /* * Cast menu position to a string. * * This allows for floats to be passed as the position. PHP will normally cast a float to an * integer value, this ensures the float retains its mantissa (positive fractional part). * * A string containing an integer value, eg "10", is treated as a numeric index. */ $position = (string) $position; $menu[ $position ] = $new_menu; } $_registered_pages[ $hookname ] = true; // No parent as top level. $_parent_pages[ $menu_slug ] = false; return $hookname; }