um_validation_safe_username_regex not allowing me to restrict additional chars?
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I’m trying to use the
um_validation_safe_username_regexfilter (see below) to limit registration usernames only to alphanumeric characters. I’m enacting it as a Snippet and activating it. But Ultimate Member is allowing users to continue registering with the dashes, spaces, underscores, etc.function um_custom_validation_safe_username( $regex_safe ) {
$regex_safe = '/^[A-Za-z0-9]+$/';
return $regex_safe;
}
add_filter( 'um_validation_safe_username_regex', 'um_custom_validation_safe_username', 10, 1 );Does this filter only add additional characters to allow, or can it be used to further restrict? I don’t understand why it’s not working.
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Never mind, turns out I’m not so bright. I misunderstood the filter as providing a list of characters it ALLOWED rather than DISALLOWED.
For anyone in the future who can benefit from this, here is the working code.
function my_custom_username_validation_regex( $default_regex ) {
// This regex disallows any character that is not alphanumeric.
$non_alphanumeric_regex = '/[^a-z0-9]/i';
return $non_alphanumeric_regex;
}
add_filter( 'um_validation_safe_username_regex', 'my_custom_username_validation_regex', 10, 1 );
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