php传值给ORACLE存储过程,该如何处理

$user = "scott";                //数据库用户名
$password = "tiger";            //密码
$conn_str = "tnsname";          //连接串(cstr : Connection_STRing)
$remote = true                  //是否远程连接
if ($remote) {
  $conn = OCILogon($user, $password, $conn_str);
}
else {
  $conn = OCILogon($user, $password);
}
$a='S_a';
$b='S_b';
$c='S_c';
$d='S_d';
$e='S_e';
$sql_sp = "BEGIN PROC_TEST(:a, :b,:c,:d,:e); END;";

//Parse
$stmt = OCIParse($conn, $sql_sp);

//执行绑定
OCIBindByName($stmt, ":a", $a, 30);          
OCIBindByName($stmt, ":b", $b, 30);
OCIBindByName($stmt, ":c", $c, 30);
OCIBindByName($stmt, ":d", $d, 30);
OCIBindByName($stmt, ":e", $e, 30);
OCIExecute($stmt);
我的异常网推荐解决方案：oracle存储过程,http://www.myexception.cn/oracle-develop/177537.html