Hello I would like to add fill a minimum number of characters in a text field. There exist a function?
Thank you for your help
As the ACF GUI only gives the option for a maximum character limit, you can use the acf/validate_value filter along with the PHP: strlen function to count the number of characters. I would also add a note under Field Instructions so the user knows the limit before submitting.
Assuming you want a minimum of ten characters:
add_filter('acf/validate_value/name=validate_this_image', 'my_acf_validate_value', 10, 4);
function my_acf_validate_value( $valid, $value, $field, $input ){
// bail early if value is already invalid
if( !$valid ) {
return $valid;
}
// load data
$my_text_field = get_field('text_field');
if ( strlen($my_text_field) < 10 ) {
$valid = 'Must be a minimum of 10 characters.';
}
// return
return $valid;
}
Hey,
I’ve now tried this solution and it work’s! thanks! even though, I have two things I’m trying to achieve with no success:
1. Is it possible to do this validation to the first field in a repeater? only to the first.
2. Is it possible to apply this validation on the wp core editor?
Thanks,
Itamar
Actually now I see that the soution doesn’t reallt work for me. I’m trying to apply this validation on a wysiwyg field and the strlen always returns 0 characters.
Itamar
