Ayuda funcion recursiva

[peperete]

Tengo una función que hace algo recursivamente, pero soy incapaz de programarla despues de muchas horas intentandolo. Sé que se puede, porque se hace algo repetidamente con la misma lógica, para obtener un array multidemensional. Sólo soy capaz de hacerla sin recursión pero limitando los ciclos a un numero determinado. ¿Alguien me echa una mano y me dice como podría hacerse recursiva?


La funcion es esta:

function ($field,$arr_secuence_reverse)
{
if (count($arr_secuence_reverse) == 1)
{
return getPrimaryKey4Field($field,$arr_secuence_reverse[0],NULL);
}

if (count($arr_secuence_reverse) == 2)
{
$sel2 = select($arr_secuence_reverse[0],"pk as pk_current",NULL,$arr_secuence_reverse[1],"pk as pk_next",NULL);
foreach ($sel2 as $n2=>$v2)
{
$res[$v2['pk_current']] = getPrimaryKey4Field($field,$arr_secuence_reverse[1],'fk_'.$arr_secuence_reverse[0]."='".$v2['pk_current']."'");
}
}

if (count($arr_secuence_reverse) == 3)
{
$sel3 = select($arr_secuence_reverse[0],"pk as pk_current",NULL,$arr_secuence_reverse[1],"pk as pk_next",NULL);
foreach ($sel3 as $n3=>$v3)
{
$res[ $v3['pk_current'] ][ $v3['pk_next'] ] = getPrimaryKey4Field($field,$arr_secuence_reverse[2],'fk_'.$arr_secuence_reverse[1]."='".$v3['pk_next']."'");
}
}

if (count($arr_secuence_reverse) == 4)
{
$sel4 = select($arr_secuence_reverse[0],"pk as pk_current",NULL,$arr_secuence_reverse[1],"pk as pk_next",NULL);
foreach ($sel4 as $n4=>$v4)
{
$sel5 = select($arr_secuence_reverse[1],"pk as pk_current",NULL,$arr_secuence_reverse[2],"pk as pk_next",NULL);
foreach ($sel5 as $n5=>$v5)
{
$res[ $v4['pk_current'] ][ $v4['pk_next'] ][ $v5['pk_current'] ] = getPrimaryKey4Field($field,$arr_secuence_reverse[3],'fk_'.$arr_secuence_reverse[2]."='".$v5['pk_current']."'");
}
}
}

if (count($arr_secuence_reverse) == 5)
{
$sel5 = select($arr_secuence_reverse[0],"pk as pk_current",NULL,$arr_secuence_reverse[1],"pk as pk_next",NULL);
foreach ($sel5 as $n5=>$v5)
{
$sel6 = select($arr_secuence_reverse[1],"pk as pk_current",NULL,$arr_secuence_reverse[2],"pk as pk_next",NULL);
foreach ($sel6 as $n6=>$v6)
{
$sel7 = select($arr_secuence_reverse[2],"pk as pk_current",NULL,$arr_secuence_reverse[3],"pk as pk_next",NULL);
foreach ($sel7 as $n7=>$v7)
{
$res[ $v5['pk_current'] ][ $v5['pk_next'] ][ $v6['pk_current'] ][ $v6['pk_next'] ] = getPrimaryKey4Field($field,$arr_secuence_reverse[4],'fk_'.$arr_secuence_reverse[3]."='".$v6['pk_next']."'");
}
}
}
}
return $res;
}