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Plugin develop with ACF Loop and custom fields

  • Hi all!
    I’m new into plugins building but I love to learn new things!

    I have a problem with my first custom plugin, that it’s a widget. in short I need to do a loop of a repeater that have two fields in the back end and this repeater is looped in a flexslider.

    The only problem is that the loop in the front-end won’t start, the back-end works well, all the custom fields are working!

    <?php
/*
Plugin Name: Aside Sponsor Gallery
Plugin URI: https://skriba.it
Description: Create a small slider in your sidebar! :D
Version: 0.1
Author: PeckPress
Author URI: https://skriba.it
License: Personal

Copyright 2019 Tusca
*/
 
 
class GallerySponsor_Widget extends WP_Widget {
 
public function __construct() {
     
        parent::__construct(
            'gallerysponsor_widget',
            __( 'Aside Sponsor Gallery', 'gallerysponsordomain' ),
            array(
                'classname'   => 'gallerysponsor_widget',
                'description' => __( 'Create a small slider in your sidebar! :D', 'gallerysponsordomain' )
                )
        );
       
        load_plugin_textdomain( 'gallerysponsordomain', false, basename( dirname( __FILE__ ) ) . '/languages' );
       
    }
 
    /**  
     * Front-end display of widget.
     *
     * @see WP_Widget::widget()
     *
     * @param array $args     Widget arguments.
     * @param array $instance Saved values from database.
     */

    public function widget( $args, $instance ) {    

        extract( $args );

        $title      = apply_filters( 'widget_title', $instance['title'] );

        echo $before_widget;
        
        echo $before_title . $title . $after_title; 

        if ( have_rows('sponsors') ): ?>

            <div class="slider">
                <div class="slide-wrap">
                    <div id="sponsor" class="flexslider">
                        <ul class="slides">

                            <?php while( have_rows('sponsors') ): the_row();

                                $image = get_sub_field('immagine-sponsor');
                                $link = get_sub_field('link-sponsor');
                                ?>

                            <a href="<?php echo $link ?>">
                                <li style="background-image:url(<?php echo $image; ?>);" class="slide"></li>
                            </a>

                            <?php endwhile; ?>

                        </ul>
                    </div>
                </div>
                </div>

        <?php endif; 

        echo $message;
        echo $after_widget;

    }
 
  
    /**
      * Sanitize widget form values as they are saved.
      *
      * @see WP_Widget::update()
      *
      * @param array $new_instance Values just sent to be saved.
      * @param array $old_instance Previously saved values from database.
      *
      * @return array Updated safe values to be saved.
      */
    public function update( $new_instance, $old_instance ) {        
         
        $instance = $old_instance;
         
        $instance['title'] = strip_tags( $new_instance['title'] );
        $instance['sponsors'] = strip_tags( $new_instance['sponsors'] );
         
        return $instance;
         
    }
  
    /**
      * Back-end widget form.
      *
      * @see WP_Widget::form()
      *
      * @param array $instance Previously saved values from database.
      */
    public function form( $instance ) {    
     
        $title      = esc_attr( $instance['title'] );
        $slider    = esc_attr( $instance['sponsors'] );
        ?>
         
        <p>
            <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label> 
            <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" />
        </p>

        <?php if( function_exists('acf_add_local_field_group') ):

        acf_add_local_field_group(array(
            'key' => 'group_5c05480e7e77e',
            'title' => 'Widget sponsor',
            'fields' => array(
                array(
                    'key' => 'field_5c05486bb0d1e',
                    'label' => 'Sponsors',
                    'name' => 'sponsors',
                    'type' => 'repeater',
                    'instructions' => '',
                    'required' => 0,
                    'conditional_logic' => 0,
                    'wrapper' => array(
                        'width' => '',
                        'class' => '',
                        'id' => '',
                    ),
                    'collapsed' => '',
                    'min' => 0,
                    'max' => 0,
                    'layout' => 'table',
                    'button_label' => '',
                    'sub_fields' => array(
                        array(
                            'key' => 'field_5c054821b0d1d',
                            'label' => 'immagine-sponsor',
                            'name' => 'immagine-sponsor',
                            'type' => 'image',
                            'instructions' => '',
                            'required' => 0,
                            'conditional_logic' => 0,
                            'wrapper' => array(
                                'width' => '',
                                'class' => '',
                                'id' => '',
                            ),
                            'return_format' => 'url',
                            'preview_size' => 'thumbnail',
                            'library' => 'all',
                            'min_width' => '',
                            'min_height' => '',
                            'min_size' => '',
                            'max_width' => '',
                            'max_height' => '',
                            'max_size' => '',
                            'mime_types' => '',
                        ),
                        array(
                            'key' => 'field_5c054888b0d1f',
                            'label' => 'link-sponsor',
                            'name' => 'link-sponsor',
                            'type' => 'url',
                            'instructions' => '',
                            'required' => 0,
                            'conditional_logic' => 0,
                            'wrapper' => array(
                                'width' => '',
                                'class' => '',
                                'id' => '',
                            ),
                            'default_value' => '',
                            'placeholder' => '',
                        ),
                    ),
                ),
            ),
            'location' => array(
                array(
                    array(
                        'param' => 'widget',
                        'operator' => '==',
                        'value' => 'gallerysponsor_widget',
                    ),
                ),
            ),
            'menu_order' => 0,
            'position' => 'normal',
            'style' => 'default',
            'label_placement' => 'top',
            'instruction_placement' => 'label',
            'hide_on_screen' => '',
            'active' => 1,
            'description' => '',
        ));

        endif; 
    }

}

/* Register the widget */
add_action( 'widgets_init', function(){
     register_widget( 'GallerySponsor_Widget' );
});
    Schermata-20....png

  • Some functions in this context may require a $post_id passed as param, at least have_rows() and get_field(), e.g.:

    
while ( have_rows( 'sponsors', 'widget_gallerysponsor_widget' ) ) : the_row();

    In your case the location is set to widget, so the $post_id value should be widget_{$widget_id}. See this documentation page for details.

  • Hi Ihor and thank you for the support, I had just tried to specify also the right widget ID in have_rows but it had not worked. Now I’m just trying to add 'widget_' . $widget_id in all the custom fields but it seems not working… Maybe i need to $istance something as I did for the plugin title?

    I don’t know if I’m missing something in the plugin code or it just won’t read the loop elements so it doesn’t start…

    Has anyone had a similar issue with custom plugin?

    EDIT ///////////

    if i print $widget_id: it prints it, so the widget_id works

  • @tusca95 Please provide the full code so I can check it locally.

  • This is the full code! The one that I wrote on the first message, you should create a new phone file in a folder in the plugins folder and you’re done!

    Thanks for your time!

  • PLease someone can help me to solve this trouble? I can’t figure out the problem..

  • @tusca95 You’re apparently developing without error reporting turned on. Your code throws multiple (E_NOTICE) Undefined index: notices for $instance[‘title’] and $instance[‘sponsors’] usage.

    $instance['sponsors'] = strip_tags( $new_instance['sponsors'] );

    In this line, you expect $instance[‘sponsors’], but that’s not how ACF sends the data, I suppose. Please, turn on error reporting and debug the incoming request first.

  • Thank you @ihorvorotnov , i’m gonna do this

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