PHP＋Oracle Instant Client

<?php
<b>●Oracleとの接続テスト</b>
<hr>
<?php
    // Oracleとの接続
    $conn = OCILogon("scott", "tiger", "dbserver:1521/orcl");

    // SQL文のparse
    $stmt = OCIParse($conn,"select * from emp ");

    // SQL文の実行
    OCIExecute($stmt);
    $ncols = OCINumCols($stmt);

    echo "<TABLE BORDER='1'>";
    echo "<TR>";
    for ( $i = 1; $i <= $ncols; $i++ ) {
        $column_name  = OCIColumnName($stmt,$i);
        echo "<TH>" . $column_name . "</TH>";
    }
    echo "</TR>";

    // データのFetch
    while(OCIFetch($stmt))
    {
        echo "<TR>";
        for ( $i = 1; $i <= $ncols; $i++ ) {
            $column_name  = OCIColumnName($stmt,$i);

            // データの表示
            echo "<TD>" . OCIResult($stmt, $column_name) . "</TD>";
        }
        echo "</TR>";
    }

    echo "</TABLE>";

    // リソースの解放
    OCIFreeStatement($stmt);

    // Oracleから切断
    OCILogoff($conn);
?>