Add your own settings page for plugin

Question

I'm using the Wordpress Plugin Boilerplate to make a plugin and I'm having some trouble outputting a form for users to input configuration options for the said plugin.

I have the following methods for a class

public function admin_add_menu()
{
    add_menu_page(
            'Paypal Me Order',
            'Paypal Me',
            'manage_options',
            'paypal_me_order',
             array($this, 'admin_display'),
            'dashicons-fa-cc-paypal',
            20
    );
}

function admin_init()
{
        register_setting( 'paypal_me_order-group', 'paypal_me_order-option', array( $this , 'sanitize') );
        add_settings_section( 'paypal_me_order-section', 'Paypal Me Settings', array( $this, 'admin_section' ), 'paypal_me_order' );
        add_settings_field( 'paypal_me_order-link', 'Paypal Me Link', array( $this, 'admn_link_field' ), 'paypal_me_order', 'paypal_me_order-section' );


}

function admin_display (){
    include plugin_dir_path(__FILE__) . 'partials/paypal_me_order-admin-display.php';
}

public function admin_section($args)
{
    include plugin_dir_path(__FILE__) . 'partials/paypal_me_order-admin-section-display.php';
}

public function admin_link_field( $args) {
    include plugin_dir_path(__FILE__) . 'partials/paypal_me_order-link-field.php';
}

Inside admin_display()

<form action="options.php" method="POST">
        <?php settings_fields('paypal_me_order-group'); ?>
        <?php do_settings_sections('paypal_me_order-section'); ?>
        <?php submit_button(); ?>
      </form>

I get the top level menu and the Page shows up but not the "section" or the "fields"

What am I doing wrong here? Why is it not working?

UPDATE

I am able to get the page to display but I cannot get the input field to print.

Answer 1

Try this. Please change the field name with yours

<?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">
            <h1>My Settings</h1>
            <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();

Answer 2

Turns out it was a typo in my functions. I can now see the settings page perfectly!