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This extension will allow you to validate your form based on the conditions that you set. You can use the variable $fields to access field values (eg $fields[“field_id”]). The validation succeeds only if the PHP code does not return or return false. If it returns [$field_id, $error_message], then the error message will be reported for that specific field.
Return an error if the date choice is before today
if( $fields['date']
Accepts only time field between 7 PM and 10 PM
if( $fields['time'] 22 ) {
return ['time', 'You must to choose a time between 7PM and 10PM' ];
}
