Directly Into theme

[fastmarketo]

I tried to use your plugin directly into the theme, but I failed miserably.

IN FUNCTIONS.PHP →

locate_template( 'inc/admin/class.settings-api.php', true );
locate_template( 'inc/admin/o-functions.php', true );

#o-functions.php code:#

<?php

/**
* Registers settings section and fields
*/
function wedevs_admin_init() {

    $sections = array(
        array(
            'id'    => 'wedevs_basics',
            'title' => __( 'Basic Settings', 'wedevs' )
        ),
        array(
            'id'    => 'wedevs_advanced',
            'title' => __( 'Advanced Settings', 'wedevs' )
        ),
        array(
            'id'    => 'wedevs_others',
            'title' => __( 'Other Settings', 'wpuf' )
        )
    );

    $fields = array(
        'wedevs_basics' => array(
            array(
                'name' => 'text',
                'label' => __('Text Input', 'wedevs'),
                'desc' => __('Text input description', 'wedevs'),
                'type' => 'text',
                'default' => 'Title'
            ),
            array(
                'name' => 'textarea',
                'label' => __('Textarea Input', 'wedevs'),
                'desc' => __('Textarea description', 'wedevs'),
                'type' => 'textarea'
            ),
            array(
                'name' => 'checkbox',
                'label' => __('Checkbox', 'wedevs'),
                'desc' => __('Checkbox Label', 'wedevs'),
                'type' => 'checkbox'
            ),
            array(
                'name' => 'radio',
                'label' => __('Radio Button', 'wedevs'),
                'desc' => __('A radio button', 'wedevs'),
                'type' => 'radio',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            ),
            array(
                'name' => 'multicheck',
                'label' => __('Multile checkbox', 'wedevs'),
                'desc' => __('Multi checkbox description', 'wedevs'),
                'type' => 'multicheck',
                'options' => array(
                    'one' => 'One',
                    'two' => 'Two',
                    'three' => 'Three',
                    'four' => 'Four'
                )
            ),
            array(
                'name' => 'selectbox',
                'label' => __('A Dropdown', 'wedevs'),
                'desc' => __('Dropdown description', 'wedevs'),
                'type' => 'select',
                'default' => 'no',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            )
        ),
        'wedevs_advanced' => array(
            array(
                'name' => 'text',
                'label' => __('Text Input', 'wedevs'),
                'desc' => __('Text input description', 'wedevs'),
                'type' => 'text',
                'default' => 'Title'
            ),
            array(
                'name' => 'textarea',
                'label' => __('Textarea Input', 'wedevs'),
                'desc' => __('Textarea description', 'wedevs'),
                'type' => 'textarea'
            ),
            array(
                'name' => 'checkbox',
                'label' => __('Checkbox', 'wedevs'),
                'desc' => __('Checkbox Label', 'wedevs'),
                'type' => 'checkbox'
            ),
            array(
                'name' => 'radio',
                'label' => __('Radio Button', 'wedevs'),
                'desc' => __('A radio button', 'wedevs'),
                'type' => 'radio',
                'default' => 'no',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            ),
            array(
                'name' => 'multicheck',
                'label' => __('Multile checkbox', 'wedevs'),
                'desc' => __('Multi checkbox description', 'wedevs'),
                'type' => 'multicheck',
                'default' => array('one' => 'one', 'four' => 'four'),
                'options' => array(
                    'one' => 'One',
                    'two' => 'Two',
                    'three' => 'Three',
                    'four' => 'Four'
                )
            ),
            array(
                'name' => 'selectbox',
                'label' => __('A Dropdown', 'wedevs'),
                'desc' => __('Dropdown description', 'wedevs'),
                'type' => 'select',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            )
        ),
        'wedevs_others' => array(
            array(
                'name' => 'text',
                'label' => __('Text Input', 'wedevs'),
                'desc' => __('Text input description', 'wedevs'),
                'type' => 'text',
                'default' => 'Title'
            ),
            array(
                'name' => 'textarea',
                'label' => __('Textarea Input', 'wedevs'),
                'desc' => __('Textarea description', 'wedevs'),
                'type' => 'textarea'
            ),
            array(
                'name' => 'checkbox',
                'label' => __('Checkbox', 'wedevs'),
                'desc' => __('Checkbox Label', 'wedevs'),
                'type' => 'checkbox'
            ),
            array(
                'name' => 'radio',
                'label' => __('Radio Button', 'wedevs'),
                'desc' => __('A radio button', 'wedevs'),
                'type' => 'radio',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            ),
            array(
                'name' => 'multicheck',
                'label' => __('Multile checkbox', 'wedevs'),
                'desc' => __('Multi checkbox description', 'wedevs'),
                'type' => 'multicheck',
                'options' => array(
                    'one' => 'One',
                    'two' => 'Two',
                    'three' => 'Three',
                    'four' => 'Four'
                )
            ),
            array(
                'name' => 'selectbox',
                'label' => __('A Dropdown', 'wedevs'),
                'desc' => __('Dropdown description', 'wedevs'),
                'type' => 'select',
                'options' => array(
                    'yes' => 'Yes',
                    'no' => 'No'
                )
            )
        )
    );

    $settings_api = new WeDevs_Settings_API();

    //set sections and fields
    $settings_api->set_sections( $sections );
    $settings_api->set_fields( $fields );

    //initialize them
    $settings_api->admin_init();
}

add_action( 'admin_init', 'wedevs_admin_init' );


/**
* Register the plugin page
*/
function wedevs_admin_menu() {
    add_options_page( 'Settings API', 'Settings API', 'delete_posts', 'settings_api_test', 'wedevs_plugin_page' );
}

add_action( 'admin_menu', 'wedevs_admin_menu' );


/**
* Display the plugin settings options page
*/
function wedevs_plugin_page() {
    $settings_api = new WeDevs_Settings_API();

    echo '<div class="wrap">';
    settings_errors();

    $settings_api->show_navigation();
    $settings_api->show_forms();

    echo '</div>';
}

/**
* Get the value of a settings field
*
* @param string $option settings field name
* @param string $section the section name this field belongs to
* @param string $default default text if it's not found
* @return mixed
*/
function my_get_option( $option, $section, $default = '' ) {

    $options = get_option( $section );

    if ( isset( $options[$option] ) ) {
    return $options[$option];
    }

    return $default;
}

Code for class.settings-api.php

But I think sub-menus are not registering thats why nothing is populating in the backend. see here →

whats the Fix?