未定义类常量中未定义的类常量“MYSQL_ATTR_INIT_COMMAND”（PHP 5.5.3）

Question

I have a config file that connects to a remote database, however i keep receiving an error that i don't know how to fix. In the earlier versions it was meant to be a bug but i assumed it would have been fixed by 5.5.3.

<?php
error_reporting(E_ALL);
ini_set('display_errors', 'on');

$host = "localhost";
$dbname = "registration";
$username = "databaseEditor";
$password = "yolo10";

// 1002 = MYSQL_ATTR_INIT_COMMAND
$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8');

try
{
    $db = new PDO("mysql:host={$host};dbname={$dbname};charset=utf8", $username$
}
catch(PDOException $ex)
{
    die("Failed to connect to the database: " . $ex->getMessage());
}

$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);

header('Content-Type: text/html; charset=utf-8');

echo "File works";
?>

I keep receiving the error "Undefined class constant 'MYSQL_ATTR_INIT_COMMAND'". I have tried to use 1002 instead of 'MYSQL_ATTR_INIT_COMMAND' but then i end up with the error "syntax error, unexpected '1002' (T_LNUMBER)" instead and i have also have installed the newest php-mysql extension.

Answer 1

Try editing your php.ini:

On a windows server you can add the following lines in your php.ini

 extension=php_pdo.dll
 extension=php_pdo_mysql.dll

On a Linux server you can compile php with the following option --with-pdo-mysql

In your php.ini, add the following lines

 extension=pdo.so
 extension=pdo_mysql.so