Title: PHP 8.1 problem + ACF
Last modified: August 9, 2023
---
# PHP 8.1 problem + ACF
* Resolved [nations112](https://wordpress.org/support/users/nations112/)
* (@nations112)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/)
* Hi,
1. After update to PHP 8.1 calendar shows error:
**Warning**: Undefined array
key “holidays” in **/wp-content/plugins/xo-event-calendar/inc/event-calendar-
widget.php** on line **235**
2. I need a function in ACF
– if the URL is filled in = redirect to the given url–
If the URL empty, use original calendar URLThank you!
Viewing 10 replies - 1 through 10 (of 10 total)
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16958530)
* Hi,
* 1.
* I have confirmed this issue. We plan to fix it in the next version.
* 2.
* I don’t understand what the problem is. Could you please be more specific?
* Thread Starter [nations112](https://wordpress.org/support/users/nations112/)
* (@nations112)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16958894)
* Hi,
* Do you know, when the new version will release?
* ACF
The link in the calendar normally goes to /akce/name_of_event (it define(‘
XO_EVENT_CALENDAR_EVENT_POST_TYPE’, ‘akce’ );
* We create in ACF custom field URL and we want custom URL if it is filled.
example
redirrect to /news/name_of_post with WP post. if not filled, then normally /akce/
name_of_event
* And if it will be filled “-“, URL will be disabled for this post (no URL action
in calendar widget)
Is it possible?
*
And last question. Can we change a color of every event in ACF?
* Example: category has blue color, in ACF will be yellow, so event will be yellow.
- This reply was modified 2 years, 9 months ago by [nations112](https://wordpress.org/support/users/nations112/).
- This reply was modified 2 years, 9 months ago by [nations112](https://wordpress.org/support/users/nations112/).
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16958977)
* A fix will be released in a day or two.
* Does ACF mean ACF Plugin? Unfortunately, this plugin does not have the ability
to work with ACF.
* Thread Starter [nations112](https://wordpress.org/support/users/nations112/)
* (@nations112)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16959038)
* Custom ACF URL works with these function correctly.
* function my_xo_event_calendar_events( $events, $args, $month_index ) { foreach(
$events as &$event) { $url = get_field( 'リンク', $event['post']->ID ); $event['
permalink'] = esc_url( $url ); } return $events; } if ( function_exists( 'get_field')){
add_filter( 'xo_event_calendar_events', 'my_xo_event_calendar_events', 10, 3 );}
* We just need a condition that if it is not filled in, will be used the original
URL of event or the link in calendar will be deactivated. Dou you know any solution?
- This reply was modified 2 years, 9 months ago by [nations112](https://wordpress.org/support/users/nations112/).
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16959102)
* Is it like this?
* ```wp-block-code
$url = get_field( 'リンク', $event['post']->ID );
$event['permalink'] = esc_url( $url );
```
* ↓
* ```wp-block-code
$url = get_field( 'リンク', $event['post']->ID );
if ( $url ) {
$event['permalink'] = esc_url( $url );
}
```
* Thread Starter [nations112](https://wordpress.org/support/users/nations112/)
* (@nations112)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16959162)
* This is exactly what we need! Thanks very much!
* Is possible to turn off the URL completely if, for example, we write “-“?
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16959627)
* Is it like this?
* ```wp-block-code
function my_xo_event_calendar_event_title( $html, $event ) {
$url = get_field( 'リンク', $event['post']->ID );
if ( ! $url ) {
$url = $event['permalink'];
}
$title = ( $event['short_title'] ) ? $event['short_title'] : $event['title'];
$html = '' . $title . '';
if ( '-' !== $url ) {
$html = '' . $html . '';
}
return $html;
}
if ( function_exists( 'get_field' ) ) {
add_filter( 'xo_event_calendar_event_title', 'my_xo_event_calendar_event_title', 10, 2 );
}
```
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16961271)
* Released version 3.2.3 to fix an error message displayed in the event calendar
widget. Please try.
* Thread Starter [nations112](https://wordpress.org/support/users/nations112/)
* (@nations112)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16961704)
* Hi,
* It works well. Thanks very much again!
* As a thank you I completely translated the plugin into Czech yesterday.
* Plugin Author [ishitaka](https://wordpress.org/support/users/ishitaka/)
* (@ishitaka)
* [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16961815)
* I’m glad it worked out.
* > As a thank you I completely translated the plugin into Czech yesterday.
* Děkuji 😊
Viewing 10 replies - 1 through 10 (of 10 total)
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* 10 replies
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* Last reply from: [ishitaka](https://wordpress.org/support/users/ishitaka/)
* Last activity: [2 years, 9 months ago](https://wordpress.org/support/topic/php-8-1-problem-acf/#post-16961815)
* Status: resolved