sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC) 返回除空记录外的所有记录

Question

我正在创建一个从存储过程中获取数据的 php API，该存储过程在 Dbeaver 上运行良好（检索带值的记录）但我的 api 正在检索没有任何错误的空值。

这是我的代码 api

$sql="exec ERP_Tracking.dbo.GET_SECURITYBRIEF_DATA";
try{
    $stmt = sqlsrv_query($connection_crm,$sql);
}
catch(exception $e)
{
    $indi="from query exec";
    $error=$e;
}


$serial_no=0;
try
{
    while($row=sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC) && $serial_no<50) //remove this condition later
    {
         
         $srow=[
            "S.NO"=>$serial_no,
            "1"=>$row["DOC"],  //DOC
            "2"=>$row["[AGRN #]"], //AGRN #
            "3"=>$row["[VEH REG #]"], //VEH_REG #
            "4"=>$row["ENGINE"], //ENGINE
            "5"=>$row["CHASIS"], //CHASIS
            "6"=>$row["[CUSTOMER TYPE]"],  //CUSTOMER_TYPE
            "7"=>$row["[CUSTOMER NAME]"], //CUSTOMER_NAME
            "8"=>$row["[FATHER NAME]"], //FATHER_NAME 
            
     
        ];
        array_push($row_array,$srow);
        //array_push($row_array,"counter checking");
        $serial_no+=1;
    }
}
catch(Exception $e)
{
    $indi="from while";
    $error=$e;
}



ob_start();
header('Content-type: application/json');
if($error!='no error')
{
    //echo json_encode($error);
    echo json_encode($indi);
}
else
{
    echo json_encode($row_array);
}
header("Connection: close");
header("Content-length: " . (string)ob_get_length());
ob_end_flush();
die;

我已确保所有列名都正确，但我收到的回复如下：

回复：

[
    {
        "S.NO": 0,
        "1": null,
        "2": null,
        "3": null,
        "4": null,
        "5": null,
        "6": null,
        "7": null,
        "8": null,
        "9": null,
        "10": null,
        "11": null,
        "12": null,
        "13": null,
        "14": null,
        "15": null,
        "16": null,
        "17": null,
        "18": null,
        "19": null,
        "20": null,
        "21": null,
        "22": null,
        "23": null,
        "24": null,
        "25": null,
        "26": null,
        "27": null,
        "28": null,
        "29": null,
        "30": null,
        "31": null,
        "32": null,
        "33": null,
        "34": null,
        "35": null,
        "36": null,
        "37": null,
        "38": null,
        "39": null,
        "40": null,
        "41": null,
        "42": null
    },
    {
        "S.NO": 1,
        "1": null,
        "2": null,
        "3": null,
        "4": null,
        "5": null,
        "6": null,
        "7": null,
        "8": null,
        "9": null,
        "10": null,
        "11": null,
        "12": null,
        "13": null,
        "14": null,
        "15": null,
        "16": null,
        "17": null,
        "18": null,
        "19": null,
        "20": null,
        "21": null,
        "22": null,
        "23": null,
        "24": null,
        "25": null,
        "26": null,
        "27": null,
        "28": null,
        "29": null,
        "30": null,
        "31": null,
        "32": null,
        "33": null,
        "34": null,
        "35": null,
        "36": null,
        "37": null,
        "38": null,
        "39": null,
        "40": null,
        "41": null,
        "42": null
    },.......

请帮我解决这个问题

Answer 1

您将 $row 设置为布尔条件 && 的结果，而不是被提取的行，因为 && 的优先级高于 =。

要么将赋值放在括号中，使用 and 而不是优先级较低的 &&，或者首先测试 $serial_no。后者在性能方面要好一些，因为当您读取限制时您不会进行额外的提取。

    while($serial_no<50 && $row=sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC)) //remove this condition later

sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC) 返回除空记录外的所有记录

sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC) returning all but empty records

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