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WordPress错误（找不到选项页面）

IT知识问答WordPress网站开发页面错误

我正在使用WordPress插件, 但是我一直在获取错误：未找到选项页面。尝试保存更改时出错。这是我的设置的页面代码：https://pastebin.com/AsfcqHhe
我已经尝试了很多修复程序, 但都无济于事。
#1【WordPress错误（找不到选项页面）】你订购字段和部分的方式有误, 请参见下面经过测试的代码并作为独立插件工作。在你这边进行测试, 然后如果可行, 请在你的主插件逻辑中实施。

< ?php/** * Plugin Name: Example Settings * Description: Example Settings * Version: 1.0 **/class Member_Only { /* Create blank array */ public function __construct() { //$this = []; // Hook into the admin menu add_action( 'admin_menu', array( $this, 'settings_page' ) ); add_action( 'admin_init', array( $this, 'setup_init' ) ); } public function settings_page() { //Create the menu item and page $parent_slug = "member_only_fields"; $page_title = "Member Only Content Settings Page"; $menu_title = "Member Only Content"; $capability = "manage_options"; $slug = "member_only_fields"; $callback = array( $this, 'settings_page_content' ); add_submenu_page( "options-general.php", $page_title, $menu_title, $capability, $slug, $callback ); } /* Create the page*/ public function settings_page_content() { ?> < div class="wrap"> < h2> Member Only Content < /h2> < form method="post" action="options.php"> < ?php settings_fields("member_only_fields"); do_settings_sections("member_only_fields"); submit_button(); ?> < /form> < ?php } /* Setup section_callback */ public function section_callback( $arguments ) { /* Set up input*/ switch( $arguments['id'] ){ case "categories" : echo "Categories that will trigger the member only message."; break; case "loginURL": echo "The login URL of your site. "; break; } } public function setup_init() { register_setting("member_only_fields", "categories"); add_settings_section("categories", "Member Only Categories: ", array($this, 'section_callback'), "member_only_fields"); add_settings_field( 'categories', 'Categories: ', array( $this, 'field_callback' ), 'member_only_fields', 'categories' ); add_settings_section("loginURL", "Login URL: ", array($this, 'section_callback'), "member_only_fields"); } /* Create input fields*/ public function field_callback ( $arguments ) { echo "< input name=\"categories\" id=\"categories\" type=\"text\" value=http://www.srcmini.com/"" .get_option("categories"). "\"\> "; } }new Member_Only();

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