--TEST--
GitHub issue #308 - empty string set to output parameter on stored procedure
--DESCRIPTION--
Verifies GitHub issue 308 is fixed, empty string returned as output parameter will remain an empty string.
--SKIPIF--
<?php require('skipif_mid-refactor.inc'); ?>
--FILE--
<?php
require_once("MsCommon_mid-refactor.inc");

try {
    // Connect
    $conn = connect();

    $procName = getProcName();

    $sql = "CREATE PROCEDURE $procName @TEST VARCHAR(200)='' OUTPUT
            AS BEGIN
            SET NOCOUNT ON;
            SET @TEST='';
            SELECT HELLO_WORLD_COLUMN='THIS IS A COLUMN IN A SINGLE DATASET';
            END";
    $stmt = $conn->exec($sql);

    $sql = "EXEC $procName @Test = :Test";
    $stmt = $conn->prepare($sql);
    $out = '';
    $stmt->bindParam(':Test', $out, PDO::PARAM_STR | PDO::PARAM_INPUT_OUTPUT, 200);
    $stmt->execute();

    $result = $stmt->fetchAll();
    $stmt->closeCursor();

    echo "OUT value: ";
    var_dump($out);

    // Free the statement and connection resources.
    dropProc($conn, $procName);
    unset($stmt);
    unset($conn);

    print "Done\n";
} catch (PDOException $e) {
    var_dump($e->errorInfo);
}
?>
--EXPECT--
OUT value: string(0) ""
Done