打开购物车，在顶部显示不推荐使用的信息：mysql_connect（）

Question

I installed open cart on my local server, but it is displaying a message at top.

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in D:\\new\\htdocs\\business\\system\\database\\mysql.php on line 6

How can I fix it ?

Answer 1

This error is because you're using PHP 5.5 or above. The best solution to this is to not suppress errors as others have said (since that prevents you seeing errors from other issues) but to install a mysqli extension/PDO extension for OpenCart. This one is free and works well - it's the one I use

Answer 2

I am using opencart-1.5.6.1.zip on ApacheFriends XAMPP Version 1.8.3 and I see this error message on every page too.

Open opencart/config.php and opencart/admin/config.php.

Edit 'mysql' -> 'mysqli'

eg

//define('DB_DRIVER', 'mysql');
define('DB_DRIVER', 'mysqli');

Save the files and no need to restart anything. The error message is gone.

Answer 3

below is the code for PDO in opencart 1.5.6 or <

    <?php
/**
 * Class for working with database (PDO)
 *
 * @property \PDO $dbh
 *
 * @author      WebImperia Dev
 * @since 0.0.1
 */
final class OC_PDO
{
    /**
     * Link to the database connection
     *
     * @var \PDO
     */
    private $dbh;
    /**
     * List of connection settings
     *
     * @var array
     */
    private $options = array(
        'PDO::ATTR_ERRMODE' => PDO::ERRMODE_SILENT
    );
    /**
     * The number of rows affected by the last operation
     *
     * @var int
     */
    private $affectedRows = 0;
    /**
     * The data for the database connection
     *
     * @var \stdClass
     */
    private $params = array();
    /**
     * Sets the connection and connects to the database
     *
     * @param string $host server Address
     * @param string $user Username
     * @param string $pass Password
     * @param string $name The database name
     * @param string $charset Encoding connection
     */
    public function __construct($host, $user, $pass, $name, $charset = 'utf8')
    {
        $this->params = new stdClass;
        # keep connection data
        $this->params->host    = $host;
        $this->params->user    = $user;
        $this->params->pass    = $pass;
        $this->params->name    = $name;
        $this->params->charset = $charset;
        $this->params->connstr = "mysql:host={$host};dbname={$name};charset={$charset}";
        # add the connection parameters
        $this->options['PDO::MYSQL_ATTR_INIT_COMMAND'] = "SET NAMES '{$charset}'";
        $this->connect();
    }
    /**
     * Connect to database
     */
    public function connect()
    {
        try {
            $this->dbh = new PDO($this->params->connstr, $this->params->user, $this->params->pass, $this->options);
            if (version_compare(PHP_VERSION, '5.3.6', '<=')) {
                $this->dbh->exec($this->options['PDO::MYSQL_ATTR_INIT_COMMAND']);
            }
        } catch (PDOException $exception) {
            trigger_error($exception->getMessage());
        }
    }
    /**
     * Query the database
     *
     * @param string $sql
     * @return \stdClass
     */
    public function query($sql = null)
    {
        if ($this->dbh) {
            $data = new stdClass;

            $sth=$this->dbh->prepare($sql);
            $sth->execute();
            //$sth= $this->dbh->query($sql);
            $this->affectedRows = $sth->rowCount();
            $data->rows         = $sth ? $sth->fetchAll() : array();
            $data->row          = isset($data->rows[0]) ? $data->rows[0] : null;
            $data->num_rows     = $this->affectedRows;
            return $data;
        }
        return null;
    }
    /**
     * Concludes the string in quotation marks to be used in the query
     *
     * @param mixed $string shielded line
     * @return string Returns shielded line or to FALSE , if the driver does not support screening
     */
    public function escape($string = null)
    {
        return $this->dbh ? $this->dbh->quote($string) : null;
    }
    /**
     * Gets the number of rows affected by the last operation
     *
     * @return int
     */
    public function countAffected()
    {
        return $this->affectedRows;
    }
    /**
     * Gets the ID of the last inserted row or sequence of values
     *
     * @return int
     */
    public function getLastId()
    {
        return $this->dbh ? $this->dbh->lastInsertId() : 0;
    }
    /**
     * Gets the name of the driver
     *
     * @return string|null
     */
    public function getDriverName()
    {
        return $this->dbh ? $this->dbh->getAttribute(PDO::ATTR_DRIVER_NAME) : null;
    }
    /**
     * Get information about the version of the client libraries that are used by the PDO driver
     *
     * @return string|null
     */
    public function getVersion()
    {
        return $this->dbh ? $this->dbh->getAttribute(PDO::ATTR_CLIENT_VERSION) : null;
    }
    /**
     * Closing a database connection
     */
    public function close()
    {
        $this->dbh = null;
    }
    public function __destruct()
    {
        $this->close();
    }
}