pg_update and PGSQL_DML_STRING

Hello, The option PGSQL_DML_STRING doesn't work with pg_update to me. I try the same option with pg_insert and it worked as I expected, but with pg_update I can't see the query and it is executed. I have an error in the query and I need to debug, so watch it is imperative. Anybody can help me to know what I need to do to be able to debug the query? Thanks in advance. CODE AND RESULT AT THE BROWSER: function Update_internal($taula, $elements, $id, $dieonerror=true, $format_date=true) { $link = Conectar(); pg_query($link, 'SET DateStyle TO ISO'); foreach (array_keys($elements) as $k) {

    $elements[$k]=stripslashes($elements[$k]);
    if ($format_date && $elements[$k]) {
       if (preg_match('/^(\d{1,2})[-\/\.](\d{1,2})[-\/\.](\d{4})$/', $elements[$k], $match))        $elements[$k]=$match[3].'/'.$match[2].'/'.$match[1];
    }

} $aux = "Update Internal en $taula\n" . print_r($elements,true) . "\nfor ID=$id\n"; file_put_contents('/tmp/pedidos.log',$aux,FILE_APPEND); $res = pg_update($link, $taula, $elements, Array('id' => $id),PGSQL_DML_STRING); $aux = "QUERY: " . $res . "\n";

  file_put_contents('/tmp/pedidos.log',$aux,FILE_APPEND);               

if ($res) return true; if ($dieonerror) dieEx("Error al actualizar los datos en $taula",'Mensaje devuelto por el servidor: '.pg_errormessage ($link)); return false; } The only error I can see is at the browser, but any information is shown: ERROR Se ha producido un error al ejecutar el script Número de error: 0 Descripción: Error al actualizar los datos en comandes Mensaje devuelto por el servidor: --