Hack to fix 'Undefined index: key' bug

EXPLANATION.md

Hack to fix 'Undefined index: key' bug

Notice: Undefined index: key in wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php on line 349

Notice: Undefined index: key in wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php on line 350

(https://support.advancedcustomfields.com/forums/topic/acf-field-functions-php349-undefined-index-key/)

hack_acf-field-functions.php

<?php
# line 350
/**
 * Hack to fix 'Undefined index: key' bug
 *
 * @author  Gary Swift
 * 
 * @link 	https://support.advancedcustomfields.com/forums/topic/acf-field-functions-php349-undefined-index-key/
 */	
if ( isset( $parent['key'] ) && isset( $parent['ID'] ) ) {//new
	// Check local fields first.
	if( acf_have_local_fields($parent['key']) ) {
		$raw_fields = acf_get_local_fields( $parent['key'] );
		foreach( $raw_fields as $raw_field ) {
			$fields[] = acf_get_field( $raw_field['key'] );
		}

	// Then check database.
	} else {
		if ( isset( $parent['ID'] ) ) {//new
			$raw_fields = acf_get_raw_fields( $parent['ID'] );
			foreach( $raw_fields as $raw_field ) {
				$fields[] = acf_get_field( $raw_field['ID'] );
			}
		}//new
	}
}//new