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 Sep 26th, 2008
1
Regular expressions can be slow, have you benchmarked these functions?
function valid_name ($username)
{
return preg_match("#^[a-z][da-z_]{6,22}[a-zd]$#i", $username);
}
could be rewritten to something like:
function valid_name ($username)
{
if (isset($username[7]) && !isset($username[24] && $username[0] !== '_' && $username[strlen($username)] !== '_')
{
$username = str_replace($username, '_', '');
return ctype_alpha($username);
}
return false;
}
Note: this is just an example, I have not tested it nor have it benchmarked is. It could however be quicker. Especially with those complex regular expressions you have. 
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