execute oracle function with an out parameter of rowtype with php

Question

I have an oracle function which has an out parameter which is of table rowtype as below:

CREATE OR REPLACE function retrive_emp
(
emp_id in integer;
rec_emp out tablename%rowtype;
.
.
.

I want to execute this function in php and my question is how to bind the out

.............

I tried below:

I have a boolean parameter so I used:

  oci_bind_by_name($stid, ":isAbsent", $isAbsent,OCI_B_BOL );

and for the rowtype parameter I used

      oci_bind_by_name($stid, ":rec_emp", $rec_emp,-1, OCI_B_BIN );

but I still get the error:

Warning: oci_execute(): ORA-06550: row 1 ، column 15 : PLS-00306: wrong number or types of arguments

Can anyone tell me what I am doing wrong?

Thanks in advance