ACF Link Picker Shortcode

acf-link-picker-shortcode.php

<?php
/**
 * Shortcode for displaying a link from the ACF Link Picker addon.
 * 
 * Usage:
 * [acf_link_picker]
 * -or-
 * [acf_link_picker field="myfield"]
 */
add_shortcode( 'acf_link_picker', function ( $atts, $content = '' ) {
  /** Extract vars **/
  extract( shortcode_atts( array(
    'field' => 'mylink'
  ), $atts ) );

  /** Get field **/
  $field_config = get_field($field);

  /** Break execution if field is not set **/
  if(!is_array($field_config))
    return '';

  /** Set default values and merge them with the config **/
  $link = array_merge(array(
    'url' => '',
    'title' => '',
    'target' => '_self'
  ), $field_config);

  ob_start();
  ?>
  <a href="<?=$link['url']?>" target="<?=$link['target']?>">
    <?=$link['title']?>
  </a>
  <?php
  return do_shortcode( ob_get_clean() );
});