在php中导入mysql数据库之前，如何检查csv文件中的每一列数据？

我的列标题是id、姓名、电话。如果我在id列中给出了名称，则数据不会插入，但消息显示为“成功导入”。我想显示类似“数据未正确定义”的消息。如何在导入mysql之前验证代码

我试图检查if和else条件，但没有得到我需要的实际结果

$sql = "INSERT IGNORE INTO `all`(`id`, `name`,`phone`)   VALUES ('".$getData[0]."','".$getData[1]."','".$getData[2]."')";
$result = mysqli_query($conn, $sql);
if($result)
 {
echo  "<script type=\"text/javascript\">alert(\"CSV File has been successfully Imported.\");                    
  }</script>";
else {
echo "<script type=\"text/javascript\"> alert(\"Invalid File Format/ Data Please check file is csv and data as per headings.\");      
}</script>";
}

$sql=“将忽略插入到`all`（`id`、`name`、`phone`）值（“$getData[0]”、“$getData[1]”、“$getData[2]”）中；
$result=mysqli\u查询（$conn，$sql）；
如果（$结果）
{
echo“警报（\”CSV文件已成功导入。\”；
}";
否则{
echo“警报（\”无效文件格式/数据，请检查文件是否为csv，数据是否符合标题。\”；
}";
}

我希望警报消息为“不正确的数据”，但得到“成功导入”。

您可以使用is_int（），检查值（在您的示例中，$getData[0]）是否为整数

在查询中添加值之前

if(!is_int($getData[0])
{ 
    echo "<script type=\"text/javascript\"> alert(\"Improper Data.\");      
    }</script>";

}
else
{
    // insert query code here
}

如果（！is_int（$getData[0]）
{ 
回显“警报（\“数据不正确.\”）；
}";
}
其他的
{
//在此处插入查询代码
}

您可以使用is_int（）检查值（在您的例子中，$getData[0]）是否为整数

在查询中添加值之前

if(!is_int($getData[0])
{ 
    echo "<script type=\"text/javascript\"> alert(\"Improper Data.\");      
    }</script>";

}
else
{
    // insert query code here
}

如果（！is_int（$getData[0]）
{ 
回显“警报（\“数据不正确.\”）；
}";
}
其他的
{
//在此处插入查询代码
}

任何插入前都应进行验证，这样您可以：

<?php

//validation of csv

if (false === validateCsvRow($getData)) {
    echo "data is not properly defined";

    // or better to throw an exception - uncomment to see difference
    // throw new \InvalidArgumentException("data is not properly defined");

    die; //end script execution
}

// if validation is okay script continues.

$sql = "INSERT IGNORE INTO `all`(`id`, `name`,`phone`)   VALUES ('".$getData[0]."','".$getData[1]."','".$getData[2]."')";

$result = mysqli_query($conn, $sql);
if($result)
 {
echo  "<script type=\"text/javascript\">alert(\"CSV File has been successfully Imported.\");                    
  }</script>";
else {
echo "<script type=\"text/javascript\"> alert(\"Invalid File Format/ Data Please check file is csv and data as per headings.\");      
}</script>";
}


function validateCsvRow(array $data) : bool
{
    $result = 1;

    //check if id is not set
    if (!isset($data[0]) {
        $result *= 0;
    }

    //check if id is not integer
    if (!is_int($data[0]) {
        $result *= 0;
    }

    //check if name is not set
    if (!isset($data[1]) {
        $result *= 0;
    }

    //check if name is not string
    if (!is_string($data[1]) {
        $result *= 0;
    }

    $minimumNameLength = 1; //number of characters

    //check if name has at least n characters
    if (!strlen($data[1]) < $minimumNameLength) {
        $result *= 0;
    }

    //return 1 => true if all was ok
    //or 0 => false if at least one check was not ok.
    return (bool) $result;

}

致：

---

应在任何插入之前进行验证，这样您可以：

<?php

//validation of csv

if (false === validateCsvRow($getData)) {
    echo "data is not properly defined";

    // or better to throw an exception - uncomment to see difference
    // throw new \InvalidArgumentException("data is not properly defined");

    die; //end script execution
}

// if validation is okay script continues.

$sql = "INSERT IGNORE INTO `all`(`id`, `name`,`phone`)   VALUES ('".$getData[0]."','".$getData[1]."','".$getData[2]."')";

$result = mysqli_query($conn, $sql);
if($result)
 {
echo  "<script type=\"text/javascript\">alert(\"CSV File has been successfully Imported.\");                    
  }</script>";
else {
echo "<script type=\"text/javascript\"> alert(\"Invalid File Format/ Data Please check file is csv and data as per headings.\");      
}</script>";
}


function validateCsvRow(array $data) : bool
{
    $result = 1;

    //check if id is not set
    if (!isset($data[0]) {
        $result *= 0;
    }

    //check if id is not integer
    if (!is_int($data[0]) {
        $result *= 0;
    }

    //check if name is not set
    if (!isset($data[1]) {
        $result *= 0;
    }

    //check if name is not string
    if (!is_string($data[1]) {
        $result *= 0;
    }

    $minimumNameLength = 1; //number of characters

    //check if name has at least n characters
    if (!strlen($data[1]) < $minimumNameLength) {
        $result *= 0;
    }

    //return 1 => true if all was ok
    //or 0 => false if at least one check was not ok.
    return (bool) $result;

}

致：

---

CSV中的字段顺序可能会有所不同，例如，第0列不能总是“id”

以CSV为例：

name, id, phone
'Alice', 1, 1234
'Bob', 2, 5678

该代码：

$sql = "INSERT IGNORE INTO `all`(`id`, `name`,`phone`) VALUES (?, ?, ?)";
$stmt = $db->prepare($sql);
$header = null;
while($row = fgetcsv($handle)) {
    if ($header == null) {
        $header = $row;
        continue;
    }
    $data = array_combine($header, $row);
    // $data is now an assoziative array, eg. you can grab "id" by name

    $stmt->execute([ $data['id'], $data['name'], $data['phone'] ]);
}

---

CSV中的字段顺序可能会有所不同，例如，第0列不能总是“id”

以CSV为例：

name, id, phone
'Alice', 1, 1234
'Bob', 2, 5678

该代码：

$sql = "INSERT IGNORE INTO `all`(`id`, `name`,`phone`) VALUES (?, ?, ?)";
$stmt = $db->prepare($sql);
$header = null;
while($row = fgetcsv($handle)) {
    if ($header == null) {
        $header = $row;
        continue;
    }
    $data = array_combine($header, $row);
    // $data is now an assoziative array, eg. you can grab "id" by name

    $stmt->execute([ $data['id'], $data['name'], $data['phone'] ]);
}