我喜欢用WordPress Codex中的选项页编写插件，但我无法检索选项。

get_option(\'your_option\'); 不起作用。

以下是选项页面代码：

<?php
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 )
    {
        $new_input = array();
        if( isset( $input[\'id_number\'] ) )
            $new_input[\'id_number\'] = absint( $input[\'id_number\'] );

        if( isset( $input[\'title\'] ) )
            $new_input[\'title\'] = sanitize_text_field( $input[\'title\'] );

        return $new_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" />\',
            isset( $this->options[\'id_number\'] ) ? 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" />\',
            isset( $this->options[\'title\'] ) ? esc_attr( $this->options[\'title\']) : \'\'
        );
    }
}

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