Expects string

Could you send me a screenshot of your ACF field and the code you use to call eae_encode_emails()?

First field is a repeater field:
https://cl.ly/image/1C2V3u2O070c

Second field inside the first, too:
https://cl.ly/image/1h3Y0j2H2u0s

Relevant options of the second field (select, with multiple selection true):
https://cl.ly/image/3w0l321G2B26

My EAE calls in the function.php:
add_filter(‘acf/load_value’, ‘eae_encode_emails’);
add_filter( ‘walker_nav_menu_start_el’, ‘eae_encode_emails’ );

Thanks Till

Can you try using the acf/format_value filter instead of acf/load_value and see if everything works as exspected?

Yes, it works. But if i remove the “if(is_string($string))”-construct it fails the same way as before.

Can you send me an export of your ACF configuration?

https://f.cl.ly/items/2U1G0h031a002j2M0E2D/advanced-custom-field-export.xml

// Error message appears on the edit-post.php page (not on the ACF plugin page)

Hey!

One permanent solution would be this:

add_filter( 'acf/format_value', function( $value ) {

	if ( is_string( $value ) ) {
		$value = eae_encode_emails( $value );
	}

	return $value;

} );

Another idea would be to target the individual fields using one of these filters:

acf/format_value/type={$field_type}
acf/format_value/name={$field_name}
acf/format_value/key={$field_key}

I’ll add the is_string() check to the next version as well.

had the same problem and Till’s code fixed it – thx a lot!