SQL - Buscador php

$where="1=1 ";

$q="";

if(isset($_REQUEST['q'])){

	$q=$_REQUEST['q'];

	$palabras=explode(" ",$_REQUEST['q']);

	foreach($palabras as $palabra){

		$where.=" AND (datoa LIKE '%".$palabra."%' OR nro_dato1 LIKE '%".$palabra."%' OR dato2 LIKE '%".$palabra."%') ";

	}

}

_add("q",$q);

$sql="SELECT * FROM tabla1  WHERE ".$where." ORDER BY datoa";

$result=$BASE2->query($sql);

_add("datos",$result);

if(isset($_REQUEST['tpl'])){

	_add("tpl",$_REQUEST['tpl']);

}

?>

<ul class='listaBotones'>

<form class="buscador" method="get">

	<div class="inpts">

        <input type="hidden" value="buscador" name="mod"/>

        {if isset($tpl)}<input type="hidden" value="{$tpl}" name="tpl"/>{/if}

        <input class="txtinput" type="text" name="q"  id="txtSearch" value="{if isset($q)}{$q}{/if}"/>

        <input class="botonUI" type="submit" value="Buscar"/>

    </div>

</form>

<table class="tbl" border="0" cellpadding="0" cellspacing="0">

    <tr>

<th>CampoA</th>

<th>CampoA1</th>

<th>CampoA2</th>

<th>CampoA3</th>

<th>CampoA4</th>

   </tr>

{foreach $datos as $dato}

<tr>

<td>{$dato.Datoa}</td>

<td>{$dato.Datoa1}</td>

<td>{$dato.Datoa2}</td>

<td>{$dato.Datoa3}</td>

<td>{$dato.Datoa4}</td>

 </tr>

{/foreach}

</table>