如何解决PHP中的数组到字符串转换错误？

Question

When I run this code, it returns True but along with that it gives an Array to string conversion error . I have seen other answers but I couldn't find the problem in this code. It gives error on query line.

<?php
$id = ['id'];
$name = $_POST["name"];
$email = $_POST["Email"];
$mobile = $_POST["MobileNo"];
$password = $_POST["Password"];
$result = mysqli_query($conn, "UPDATE sign_up SET full_name = '$name', email = '$email', phone_official = '$mobile', password ='$password'where idsign_up='$id'");
$res = array();

// /$res['id'] = 0;

if ($result) {
    $res['check'] = true;
    $res['message'] = 'Data Updated..';

    // /$res['id'] = mysqli_insert_id($conn);
}
else {
    $res['check'] = false;
    $res['message'] = 'There was an Errorr!';

    // /$res['message'] = $emailErr;
}

header('Content-Type: application/json');
echo json_encode($res);

Answer 1

Firstly I would advise to look into PDO, as your scripts are vulnerable for injections now. Information on PDO from PHP.net

To solve your error I think it would be as easy to change the first line of code. It says now:

$id=['id'];

You might wanted to have a $_GET or $_POST, but in this form it won't work for sure. If the ID is in the URL I guess it would become:

$id=$_GET['id'];

If that doesn't solve it please share the error code with line numbers.

But again, look into PDO because this script is really vulnerable.