<div dir="ltr">Indeed, thanks for that :)<div><br></div><div>S</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 22, 2015 at 11:00 PM, Alan Lord <span dir="ltr"><<a href="mailto:alanslists@gmail.com" target="_blank">alanslists@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 22/06/15 16:47, Stacey Johnson wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
OK I answer myself as follow:<br>
^(?!(?:keyword1|keyword2)$)[a-z0-9\_]{3,}$<br>
</blockquote>
<br></span>
This is a *really* useful online tool:<br>
<br>
<a href="https://regex101.com/" rel="noreferrer" target="_blank">https://regex101.com/</a><br>
<br>
HTH<br>
<br>
Al<br>
<br>
<br>
_______________________________________________<br>
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</blockquote></div><br></div>