如何为PHP/MySQL循环使用多个准备好的语句

我有一个循环，我解析CSV中的行，需要插入新数据或检查现有数据，然后获取新记录或现有记录的ID。我使用一个准备好的INSERT语句和唯一索引indicies？，然后捕获错误以检查记录是否存在。这种方法在只使用一条准备好的语句进行测试时效果非常好

但是，当我将第二个准备语句步骤添加到我的循环中时（与上述方法相同，但数据不同），我开始收到警告：mysqli_stmt_bind_param[function.mysqli stmt bind param]：变量数与[my page的绝对路径]中准备语句中的参数数不匹配当循环返回到带有新数据的第一个准备好的语句时

我有一种感觉，我需要关闭一个resultset或类似的简单东西，但我不知道如何在不关闭整个数据库连接的情况下有效地完成它。这是我的代码，它从表单接收CSV文件：

if ($_POST["upload"] == "1") {

    //Connect to the database
    $hostname = xxx;
    $username = xxx;
    $dbname = xxx;
    $password = xxx;

    $dbh = mysqli_connect($hostname,$username,$password,$dbname) or die("Problem connecting: ".mysqli_error());
    $stmt = mysqli_stmt_init($dbh);

    $sql1 = "INSERT INTO tbl_TABC_Locations (LocName,LocAddress,LocCity,LocState,LocZip,LocCounty,LocPhone,LocPermitNo) 
    VALUES (?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE LocID=LAST_INSERT_ID(LocID)"; //UNIQUE = LocPermitNo
    $ps_ChkPermit = mysqli_stmt_prepare($stmt, $sql1);

    $sql2 = "INSERT INTO tbl_TABC_ReportDates (ReportMonth,ReportYear,ReportDateFull) 
    VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE ReportDateID=LAST_INSERT_ID(ReportDateID)"; //UNIQUE = ReportDateFull
    $ps_ChkReportDate = mysqli_stmt_prepare($stmt, $sql2);

    $strFileName = $_POST["filename"];

$row = 0;
if (($handle = fopen($strFileName, "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $strPermitNo = trim($data[0]);

        //Clean Location name
        $strLocName = trim($data[1]);
        $strLocName = str_replace('"', "", $strLocName);
        $strLocName = str_replace(";","-", $strLocName);
        $strLocName = addslashes($strLocName);

        if ($ps_ChkPermit) 
        {
          mysqli_stmt_bind_param($stmt, "ssssiiis", $field1, $field2, $field3, $field4, $field5, $field6, $field7, $field8);

          $field1 = $strLocName;
          $field2 = trim(addslashes($data[2]));
          $field3 = trim(addslashes($data[3]));
          $field4 = trim($data[4]);
          $field5 = trim($data[5]);
          $field6 = trim($data[6]);
          $field7 = trim($data[7]);
          $field8 = $strPermitNo;
          mysqli_stmt_execute($stmt);

          $intLocID = mysqli_insert_id($dbh);
        }

        //Clean up report dates
        $strReportDate = trim($data[8]);
        $aryNewDate = explode("/", $strReportDate);
        $strNewYear = $aryNewDate[0];
        $strNewMonth = $aryNewDate[1];

        if ($ps_ChkReportDate) 
        {
          mysqli_stmt_bind_param($stmt, "iis", $field1, $field2, $field3);

          $field1 = $strNewMonth;
          $field2 = $strNewYear;
          $field3 = $strReportDate;

          mysqli_stmt_execute($stmt);

          $intDateID = mysqli_insert_id($dbh);
        }

    }
    echo "Closing file now";
    fclose($handle);
}
mysqli_stmt_close($stmt);
mysqli_close($dbh);
}

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我能想到的唯一一件事是从第一个if/while条件/循环中删除第二个查询，因为$field1、$field2、$field3已经在第一个循环中定义了。我不认为这是因为$field1、$field2、$field3在语句执行之前被重新定义了。老实说，我自己还没有完全信服。