使用php和mysql的500内部服务器错误[重复]

Question

This question already has an answer here:

• How to get MySQLi error information in different environments? / mysqli_fetch_assoc() expects parameter 1 to be mysqli_result 1 answer

So my website keeps giving me a 500 Internal Server Error when I attempt to open my PHP file to write to the MySQL database

HTML

<div id="body">
<form action="index.php" method="post" />
  <input type="text" name="usertext" />
  <input type="submit" value="Submit" />
 </form>
</div>

PHP

<?php

 define('DB_NAME', '****');
 define('DB_USER', '****');
 define('DB_PASSWORD', '****');
 define('DB_HOST', '****');

 $link = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD);

 if (!$link) {
    die('Could not connect: ' . mysqli_error());
 }

$db_selected = mysqli_select_db(DB_NAME, $link);

if (!$db_selected) {
    die('Cannot access' . DB_NAME . ': ' . mysqli_error());
}

$value = $_POST['****'];

$sql = "INSERT INTO **** (****) VALUES ('$value')";

if (!mysqli_query($sql)) {
    die('Error: ' . mysqli_error());
}

mysqli_close();
?>

I'm still new to HTML and PHP, but I can't figure out what I did wrong even after hours of searching. My website keeps giving me that same error. I use goDaddy as a host if that helps at all.

</div>

Answer 1

Most 500 errors are server-side errors.

There can be following probable reasons :

1. Permission Error : Check permission of files and folders. In most of those cases, an incorrect permission on a PHP and CGI script is to blame. The permission should be set at 755.
2. PHP Timeout : Timeout rules, or better error handling in your script, should help if this is the cause of the 500 error.
3. Error in .htaccess : Check if .htaccess is structured properly.