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Conditional logic applied to 'Required'

  • Hello,

    Any hint on how to face:

    Make a field required only if another field is true.


  • Hi @permanyer

    I think you can use the “acf/validate_value” hook to do it. You can get the value from other fields from the $_POST[‘acf’][‘field_123456789’] variable, where ‘field_123456789’ is the key of the field you want to check.

    I hope this helps.

  • That is exactly it. Thank you!

    My example:

    add_filter('acf/validate_value/name=event_category',	'validate_empty_fields', 10, 4);
    function validate_empty_fields( $valid, $value, $field, $input ){
    	// bail early if value is already invalid
    	if( !$valid ) {return $valid; }
    	$is_event_public = $_POST['acf']['field_55420ab8d2eb2']; // This field is a checkbox
    			$valid = __('This field is required for public events');
    	return $valid;
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