Reply To: Retrieve most recent front-end edited fields?

• John Huebner

• January 20, 2017 at 8:20 am

Sometimes I find things interesting and believe it or not, this type of coding is what I do to relax. I’ve done this in OOP because it’s the way I think.

I’m not sure if there are any errors, I have not tested this. It’s not meant to be exact but it’s easier to give a code example than to explain all the details.

<?php 
  
  /*
      store updated values for a repeater
      so they can easily be used elsewhere
      
      This specific class will save new values
      for new images added to a repeater
      there should only be 1 image field in the repeater
  
  */
  
  new for_kkranzo_store_recent();
  
  class for_kkranzo_store_recent {
    
    // this will store any updates that are made
    private $new_content = array();
    
    // a WP option name value were you can store updated content
    private $option_name = 'for_kkranzo_store_recent';
    
    // this will hold images that were added in the past
    private $old_images = array();
    
    // set the maximum number of entries to save in recently added
    private $max = 10;
    
    // name and key of the repeater field
    private $repeater = array(
      'name' => 'my_repeater_field',
      'key' => 'field_XXXXXXXXXXXXX'
    );
    
    // name and key of the image sub field
    private $image_field = array(
      'name' => 'my_image_field',
      'key' => 'field_XXXXXXXXXXXXX'
    );
    
    // sub field key => name pairs
    // don't include the image field
    private $sub_fields = array(
      'field_XXXXXXXXXXXXX' => 'my_field_1',
      'field_XXXXXXXXXXXXX' => 'my_field_2'
      // etc...
    );
    
    // array of all of the sub fields you want to store
    
    public function __construct() {
      
      // add a filter that runs before ACF saves values
      add_filter('acf/save_post', array($this, 'before_acf'), 1);
      
    } // end public function __construct
    
    public function before_acf($post_id) {
      // this filter will be called before ACF saves new values
      
      // first make sure the repeater is set in $_POST
      // if not the we don't need to do anything
      if (empty($_POST['acf'][$this->repeater['key']])) {
        return;
      }
      
      // get all the existing images for this post
      // and store them to compare against
      $rows = get_field($this->repeater['name'], $post_id, false); // no formatting
      foreach ($values as $row) {
        $this->old_images[] = $row[$this->image_field['name']];
      } // end foreach rows
      
      // now loop trough the submitted values to see if there are new ones
      foreach ($_POST['acf'][$this->repeater['key']] as $row) {
        // see if this image is old
        // if it is then continue to the next one
        $image = intval($row[$this->image_field['key']]);
        if (in_array($image, $this->old_images)) {
          continue;
        }
        
        // new image - save it
        $new = array(
          'post_id' => $post_id,
          'attachment_id' => $image
        );
        foreach ($this->sub_fields as $key => $name) {
          $new[$name] = $row[$key];
        } // end foreach sub field
        
        // add the new content to the list
        $this->new_content[] = $new;
        
      } // end foreach row
      
      // if there was nothing new then bail
      if (empty($this->new_content)) {
        return;
      }
      
      // get the old option, if anything
      $option = get_options($this->option_name, array());
      
      // merge the old array onto the new array
      $option = array_merge($this->new_content, $option);
      
      // strip it down to the max number to save
      $option = array_slice($option, 0, $this->max);
      
      // save the new option
      update_option($option, $value);
      
      // now wherever you want to show the new values
      // you can get this option and you have a reference to
      // the post id, the attachment id and any of the other
      // field values you want to display
      
    } // end public function before_acf
    
  } // end class for_kkranzo_store_recent
  
?>