How to get the output parameters of mssql stored procedure in php

$conn=mssql_connect("127.0.0.1","user","passwd");
mssql_select_db("mydb");
$stmt=mssql_init("pr_name",$conn) ;//
$a=50001;
mssql_bind($stmt,"RETVAL",$val,SQLVARCHAR); //Used to directly return values ​​such as return -103.
mssql_bind($stmt,"@outvar",$b,SQLVARCHAR,true);//Used to return the output parameters defined in the stored procedure
mssql_bind($stmt,"@invar",$a,SQLINT4);
 $result = mssql_execute($stmt,true);//Cannot return the result set, you can only get the output parameters
//$result = mssql_execute($stmt,false); //Return the result set
//$records=mssql_fetch_array( $result);
//print_r($records);
//mssql_next_result($result); The next result set, when equal to FALSE, the next one is the output parameter
echo $b;
echo $val;
?> ;

Problem: As usual, a stored procedure procA of MS Sql Server is used, which gives an output parameter nReturn and returns a result set. There are some small problems in how to let PHP call this procA. I originally hoped that such code could get both the output parameters and the returned result set:

// Initializes a stored procedure:
$nYear = 2004;
$nPageSize = 20;
$nPageNo = 1;
// Initializes a stored procedure:
 $stmt = mssql_init("proc_stat_page", $db_mssql->Link_ID);
// Bind input parameters:
mssql_bind($stmt, "@nReturn", $nReturn, SQLINT4, TRUE);
mssql_bind($stmt, "@nYear", $nYear, SQLINT4);
mssql_bind($stmt, "@nPageSize", $nPageSize, SQLINT4);
mssql_bind($stmt, "@nPageNo", $nPageNo, SQLINT4);
// Execute storage Process, get the QueryID:
$db_mssql->Query_ID = mssql_execute($stmt,false);
?>

Although the result set is obtained, the $nReturn parameter cannot be obtained in this way Output parameters.

If you change the last sentence to:

$db_mssql->Query_ID = mssql_execute($stmt,true);

I got the output parameters, but the result set is gone.

Solution: At the end we add a sentence:

// After the last result has been returned the return value will have the value returned by the stored procedure.
mssql_next_result($db_mssql->Query_ID);

immediately, The magic works: PHP populates $nRetVal with the correct output parameters.