Código PHP:
$consulta ="select p1.Nombre as id_Cliente, p2.Nombre,p3.Fecha as Fecha,p4.Nombre as producto
from tblclientes as p1, tblempleados as p2, tbl_op as p3,tblproducto as p4,tblproducciones as p5
where ".$fechas." ".$id_opPOST."
p3.id_Cliente=p1.id_Cliente
and p4.id_Producto=p5.id_Producto
and p3.id_op=p5.id_op order by p3.Fecha";
echo "<script>alert(\"$consulta\")</script>";
no me esta mostrando nada pasa de largo