Replace some characters in User Profile Field content (Many people should need it)

[basketmen]

I need to replace some characters in User Profile Field content,
for example aaa to be bbb


maybe there is two way, please help to make one of them or both works :




1. i see in User Profile Field Manager, there is regex function, what is the regex function patern to search and replace there?




2. or using a plugin with profile_updateprofile hook, but looks like below variable code in red are still wrong, so this is still not working

$fieldcontentbefore = array(
'aaa',
'ccc'
);

$fieldcontentafter = array(
'bbb',
'ddd'
);


$vbulletin->user[$field] = str_replace($fieldcontentbefore, $fieldcontentafter, $vbulletin->user[$field]);