WordPress自定义选项未保存

我在为wordpress添加自定义设置页面时遇到问题, 更具体地说, 是要获取保存的选项。

由于不同的示例和不同的功能对同一事物的解释不同, 因此此文档似乎缺乏而且前后不一致。

WordPress Codex上的最新示例使用清理回调函数来保存选项。但是add_settings_field()文档说保存选项应该在幕后进行。似乎更愿意使用san回调进行保存。

我尝试了各种不同的方法, 但有一次我的代码设法保存了其中一个字段, 但不是全部。

我当前的代码：

class wwtkSettings {
    public function __construct() {
        if ( is_admin() ){
            add_action( 'admin_menu', array( $this, 'add_plugin_page' ) );
            add_action( 'admin_init', array( $this, 'page_init' ) );
        }
    }

    public function add_plugin_page(){
        add_options_page( 'WWTK Settings', 'WWTK settings', 'manage_options', 'wwtk-settings', array( $this, 'create_admin_page' ) );
    }

    public function create_admin_page() {
        ?>
        <div class="wrap">
            <?php screen_icon(); ?>
            <h2>WWTK Settings</h2>
            <form method="post" action="options.php">
                <?php
                settings_fields( 'wwtk-setting-group' );
                do_settings_sections( 'wwtk-settings' );
                ?>
                <?php submit_button(); ?>
            </form>
        </div>
        <?php
    }

    public function page_init() {
        register_setting( 'wwtk-setting-group', 'wwtk-setting-group', array( $this, 'wwtk_validate_options' ) );

        add_settings_section(
            'wwtk-settings-section', 'Categories and pages', array( $this, 'print_section_info' ), 'wwtk-settings'
            );  

        add_settings_field(
            'frontpage', 'Frontpage category:', array( $this, 'create_category_field' ), 'wwtk-settings', 'wwtk-settings-section', 'frontpage'
            );
        add_settings_field(
            'category1', 'Category & page 1', array( $this, 'create_category_field' ), 'wwtk-settings', 'wwtk-settings-section', 'category1'
            );
        add_settings_field(
            'category2', 'Category & page 2', array( $this, 'create_category_field' ), 'wwtk-settings', 'wwtk-settings-section', 'category2'
            );
        add_settings_field(
            'category3', 'Category & page 3', array( $this, 'create_category_field' ), 'wwtk-settings', 'wwtk-settings-section', 'category3'
            );
    }

    //TODO: check if category and page exist. and sanitize!
    public function wwtk_validate_options( $input ) {
        return $input;
    }

    public function print_section_info(){
        print 'Enter the names of categories that should be displayed on the page with the same name(both must exist):';
    }

    public function create_category_field($args){
        ?><input type="text" id="<?php echo $args ?>" name="wwtk-setting-group" value="<?php echo get_option( 'wwtk-setting-group['.$args.']' ); ?>" /><?php
    }
}

#1

/* code similar to your example */

class MySettingsPage{
/**
 * Holds the values to be used in the fields callbacks
 */
private $options;

/**
 * Start up
 */
public function __construct()
{
    add_action( 'admin_menu', array( $this, 'add_plugin_page' ) );
    add_action( 'admin_init', array( $this, 'page_init' ) );
}

/**
 * Add options page
 */
public function add_plugin_page()
{
    // This page will be under "Settings"
    add_options_page(
        'Settings Admin', 'My Settings', 'manage_options', 'my-setting-admin', array( $this, 'create_admin_page' )
    );
}

/**
 * Options page callback
 */
public function create_admin_page()
{
    // Set class property
    $this->options = get_option( 'my_option_name' );
    ?>
    <div class="wrap">
        <?php screen_icon(); ?>
        <h2>My Settings</h2>           
        <form method="post" action="options.php">
        <?php
            // This prints out all hidden setting fields
            settings_fields( 'my_option_group' );   
            do_settings_sections( 'my-setting-admin' );
            submit_button(); 
        ?>
        </form>
    </div>
    <?php
}

/**
 * Register and add settings
 */
public function page_init()
{        
    register_setting(
        'my_option_group', // Option group
        'my_option_name', // Option name
        array( $this, 'sanitize' ) // Sanitize
    );

    add_settings_section(
        'setting_section_id', // ID
        'My Custom Settings', // Title
        array( $this, 'print_section_info' ), // Callback
        'my-setting-admin' // Page
    );  

    add_settings_field(
        'id_number', // ID
        'ID Number', // Title 
        array( $this, 'id_number_callback' ), // Callback
        'my-setting-admin', // Page
        'setting_section_id' // Section           
    );      

    add_settings_field(
        'title', 'Title', array( $this, 'title_callback' ), 'my-setting-admin', 'setting_section_id'
    );      
}

/**
 * Sanitize each setting field as needed
 *
 * @param array $input Contains all settings fields as array keys
 */
public function sanitize( $input )
{
    if( !is_numeric( $input['id_number'] ) )
        $input['id_number'] = '';  

    if( !empty( $input['title'] ) )
        $input['title'] = sanitize_text_field( $input['title'] );

    return $input;
}

/** 
 * Print the Section text
 */
public function print_section_info()
{
    print 'Enter your settings below:';
}

/** 
 * Get the settings option array and print one of its values
 */
public function id_number_callback()
{
    printf(
        '<input type="text" id="id_number" name="my_option_name[id_number]" value="%s" />', esc_attr( $this->options['id_number'])
    );
}

/** 
 * Get the settings option array and print one of its values
 */
 public function title_callback()
 {
    printf(
        '<input type="text" id="title" name="my_option_name[title]" value="%s" />', esc_attr( $this->options['title'])
    );
 }
}

if( is_admin() )
    $my_settings_page = new MySettingsPage();