I assume it is because it is in a String, you should try:
...REGEXP ?
and then set the value with a ? prepended, e.g.

...
$sth->bind_param($x,  $value);
...
$sth->execute();

[download]

regards,
tomte

edit:striked out my foolishness

In reply to Re: Using a DBI placeholder by Tomte
in thread Using a DBI placeholder by stew

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