An Advanced Custom Fields shortcode that allows to loop through a field with a repeater. This only handles simple cases, it can't handle nested repeater fields

acf_repeater_shortcode.php

<?php
/**
 * ACF Pro repeater field shortcode
 *
 * I created this shortcode function because it didn't exist and it was being requested by others
 * I originally posted it here: https://support.advancedcustomfields.com/forums/topic/repeater-field-shortcode/
 * 
 * @attr {string} field - (Required) the name of the field that contains a repeater sub group
 * @attr {string} sub_fields - (Required) a comma separated list of sub field names that are part of the field repeater group
 * @attr {string} post_id - (Optional) Specific post ID where your value was entered. Defaults to current post ID (not required). This can also be options / taxonomies / users / etc
 */
function my_acf_repeater($atts, $content='') {
  extract(shortcode_atts(array(
    "field" => null,
    "sub_fields" => null,
    "post_id" => null
  ), $atts));

  if (empty($field) || empty($sub_fields)) {
    // silently fail? is that the best option? idk
    return "";
  }

  $sub_fields = explode(",", $sub_fields);
  
  $_finalContent = '';

  if( have_rows($field, $post_id) ):
    while ( have_rows($field, $post_id) ) : the_row();
      
      $_tmp = $content;
      foreach ($sub_fields as $sub) {
        $subValue = get_sub_field(trim($sub));
        $_tmp = str_replace("%$sub%", $subValue, $_tmp);
      }
      $_finalContent .= do_shortcode( $_tmp );

    endwhile;
  else :  
    $_finalContent = "$field does not have any rows";
  endif;

  return $_finalContent;
}

add_shortcode("acf_repeater", "my_acf_repeater");

example.md

Shortcode for Advanced Custom Fields Repeater rows

Setup a repeater field, in this example we'll call it "example-row"

and you give it the following sub fields:

• example-name, text
• example-phone, text
• example-image, image, returns URL

in your post content setup the shortcode like this:

[acf_repeater field="example-row" sub_fields="example-name, example-phone, example-image"]
  User: %example-name%
  Phone: %example-phone%
  profile pic: %example-image%
[/acf_repeater]

notice how the list of comma separated items within the sub_field attribute become %variables% accessible within the repeater shortcode. This allows you to create a template row for your repeater. These items get trimmed so spaces around the commas in the list are ok.

Important

You can NOT nest repeater shortcodes as library is right now. If you need to then I would recommend adding more shortcodes with different names but pointing to the same function like this:

add_shortcode("acf_repeater", "my_acf_repeater");
add_shortcode("acf_sub_repeater", "my_acf_repeater");

and now you can nest it.

[acf_repeater field="example-row" sub_fields="example-name,  example-phone"]
  <div class="user">User: %example-name%</div><div class="phone">Phone: %example-phone%</div>
  [acf_sub_repeater field="example-sub-row" sub_fields="sub-item1, sub-item2"]
    %sub-item1% %sub-item2%
  [/acf_sub_repeater]
   You can put nested repeaters adjacent to each other, you just can't nest it again. For that you'll need to make more shortcodes
  [acf_sub_repeater field="example-sister-row" sub_fields="sub-item1, sub-item2"]
    %sub-item1% %sub-item2%
  [/acf_sub_repeater]
[/acf_repeater]

TODO: Figure out a better way to handle nesting rows without having to create more copies of the shortcode.