variables js guardar en php

[sergiop21]

[PHP]
<select name="psp_NumPayments" id="psp_NumPayments">
<?php

foreach(getFeesByPSPProduct("variable_de_Select"]) as $fee): ?>
<option value="<?php echo $fee['quantity'] ?>"><?php echo $fee['quantity'] ?></option>
<?php endforeach ?>
</select>


[en Variable_de_Select_ va el valor seleccionado de los botones radio.