can't connect to mysql database using host,user and pass

Question

I keep getting this whenever I run the below code:

Fatal error: Call to undefined function mysql_connect() in C:\\wamp\\www\\php-academy\\113-connect-db.php

---

    <?php
    $conn_error ='could not connect';
    $mysql_host = 'localhost';
    $mysql_user = 'root';
    $mysql_pass = '';
    mysql_connect($mysql_host, $mysql_user, $mysql_pass) or                                                   die($conn_error);

    $mysql_db = 'a_database';

    mysql_select_db($mysql_db) or die($conn_error);
    echo 'Connected!';
    ?>

Answer 1

That probably means you don't have the MySQL extension loaded. You can test whether the extension is loaded with extension_loaded("mysql"); .

Answer 2

I suspect that this is because the extension is not loaded. I would check your php_info(); to find out.

Once you do your code should work, although I prefer to assign the mysql_connect() to a variable and then call that variable in mysql_select_db() as I have below:

$defHost     = 'localhost';
$defUsername = 'username';
$defPassword = 'password';
$defDatabase = 'database_name';

$connect = mysql_connect($defHost, $defUsername, $defPassword) or die();
mysql_select_db($defDatabase, $connect) or die();

Answer 3

The reasons for the error may be the following:

Incorrect access details to server database are specified in configuration file. There are no read permissions for configuration file. Provide read permissions for the file.