dp518158 2014-09-27 17:52
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PHP代码中的错误

I am doing PHP coding for first time. I got the following errors:

Errors :

Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 9

Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 10

Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 11

Notice: Undefined index: empID in C:\xampp\htdocs\331002.php on line 12

Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 12

Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 17

Warning: mysqli_error() expects parameter 1 to be mysqli, boolean given in C:\xampp\htdocs\331002.php on line 18

Here's my code:

<?php
$con=mysqli_connect("localhost","root","root","student");
// Check connection
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

// escape variables for security
$FName = mysqli_real_escape_string($con, $_POST['firstName']);
$LName = mysqli_real_escape_string($con, $_POST['lastName']);
$Salary = mysqli_real_escape_string($con, $_POST['salary']);
$ID = mysqli_real_escape_string($con, $_POST['empID']);

$sql="INSERT INTO PersonInfo (FName, LName, empID, Salary)
VALUES ('$FName', '$LName','$ID','$Salary')";

if (!mysqli_query($con,$sql)) {
  die('Error: ' . mysqli_error($con));
}
echo "1 record added";

mysqli_close($con);
?>
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3条回答 默认 最新

  • dsdsds12222 2014-09-27 17:58
    关注

    The usual "check connection" pattern is the following:

    <?php
    $con=mysqli_connect("localhost","root","root","student");
    // Check connection
    if (false === $con) {
      // die will "finish" the script
      die("Failed to connect to MySQL: " . mysqli_connect_error());
    }
    

    mysqli_real_escape_string needs a valid connection, which you don't seem to have.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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