MYSQLi error: User already has more than 'max_user_connections' active connections [duplicate]

Question

I have this error below on a site I am running. I don't understand why is that as it works fine on my localhost. Is it something to do with the host? I am on an Unix server.

Warning: mysqli::mysqli() [mysqli.mysqli]: (42000/1203): User dbo343879423 already has more than 'max_user_connections' active connections in /homepages/9/d322397966/htdocs/dump/models/class_database.php on line 11
Connect failed: User dbo343879423 already has more than 'max_user_connections' active connections 
Warning: mysqli::close() [mysqli.close]: Couldn't fetch mysqli in /homepages/9/d322397966/htdocs/dump/models/class_database.php on line 160

the error says 'User dbo343879423 already has more than 'max_user_connections' active connections in /homepages/9/d322397966/htdocs/dump/models/class_database.php on line 11', so this is the line 11 in the script - I can't see anything wrong!

$this -> connection = new mysqli($hostname,$username,$password,$database);

below is the entire class in class_database.php, is it wrong in other part of script and I should change?

<?php
#connects the database and handling the result
class __database {

    protected $connection = null;
    protected $error = null;

    #make a connection
    public function __construct($hostname,$username,$password,$database)
    {
        $this -> connection = new mysqli($hostname,$username,$password,$database);

        if (mysqli_connect_errno()) 
        {
            printf("Connect failed: %s\n", mysqli_connect_error());
            exit();
        }
    }

    #fetches all result rows as an associative array, a numeric array, or both
    public function fetch_all($query) 
    {
        $result = $this -> connection -> query($query);
        if($result) 
        {
            return $result -> fetch_all(MYSQLI_ASSOC);
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }
    }

    #fetches a result row as an associative array, a numeric array, or both
    public function fetch_assoc_while($query)
    {
        $result = $this -> connection -> query($query);
        if($result) 
        {
            while($row = $result -> fetch_assoc())
            {
                $return_this[] = $row;
            }

            if (isset($return_this))
            {
                return $return_this;
            }
            else
            {
                return false;
            }
        }
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }
    }

    #fetch a result row as an associative array
    public function fetch_assoc($query)
    {
        $result = $this -> connection -> query($query);
        if($result) 
        {
            return $result -> fetch_assoc();
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }
    }

    #get a result row as an enumerated array
    public function fetch_row($query)
    {
        $result = $this -> connection -> query($query);
        if($result) 
        {
            return $result -> fetch_row();
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }
    }

    #get the number of rows in a result
    public function num_rows($query)
    {
        $result = $this -> connection -> query($query);
        if($result) 
        {
            return $result -> num_rows;
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }
    }

    #performs a query on the database
    public function query($query)
    {
        $result = $this -> connection -> query($query); 
        if($result) 
        {
            return $result;
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }

    }

    #escapes special characters in a string for use in a SQL statement, taking into account the current charset of the connection
    public function real_escape_string($string)
    {
        $result = $this -> connection -> real_escape_string($string);   
        if($result) 
        {
            return $result;
        } 
        else
        {
            $this -> error = $this -> connection -> error;
            return false;
        }

    }

    #display error
    public function get_error() 
    {
        return $this -> error;
    }

    #closes the database connection when object is destroyed.
    public function __destruct()
    {
        $this -> connection -> close();
    }
}
?>

or should I just change the host for good!??

below is the implementation of the database connection class. If I take this part out, the error won't appear anymore, but I do the same at other parts of the site as well and they won't cause any problem!

<!-- side-video-library -->
<div id="side-video-library" class="round-corner">

    <h4><a href="<?php echo HTTP_ROOT;?>videos"><span>ENER VIDEO LIBRARY</span></a></h4>

    <?php
    $sql = "
    SELECT *
    FROM root_pages

    WHERE root_pages.parent_id = '8'
    AND root_pages.pg_highlight = '1'
    AND root_pages.pg_hide != '1'
    ORDER BY rand() DESC
    LIMIT 1
    ";

    #instantiate the object of __database class
    $object_item = new __database(DB_HOST,DB_USER,DB_PASS,DB_NAME);
    $item = $object_item -> fetch_assoc($sql);

    #instantiate the object of __database class
    $object_item_num = new __database(DB_HOST,DB_USER,DB_PASS,DB_NAME);
    $total_item = $object_item_num -> num_rows($sql);
    //echo $total_item;
    ?>

    <?php
    if ($total_item > 0)
    {
        $sql = "
        SELECT *
        FROM root_tagged

        LEFT JOIN root_tags ON ( root_tags.tag_id = root_tagged.tag_id )

        WHERE root_tagged.pg_id = '".$item['pg_id']."'
        ";

        #instantiate the object of __database class
        $object_tagname = new __database(DB_HOST,DB_USER,DB_PASS,DB_NAME);
        $item_tagname = $object_tagname -> fetch_assoc($sql);

        #instantiate the object of __database class
        $object_tagname_num = new __database(DB_HOST,DB_USER,DB_PASS,DB_NAME);
        $total_tagname = $object_tagname_num -> num_rows($sql);
    ?>
    <p class="item-video">
        <object style="width: 183px; height: 151px;" width="183" height="151" data="http://www.youtube.com/v/<?php echo get_video_id($item['pg_content_1']) ;?>" type="application/x-shockwave-flash">
            <param name="wmode" value="transparent" />
            <param name="src" value="http://www.youtube.com/v/<?php echo get_video_id($item['pg_content_1']) ;?>" />
        </object>
    </p>

    <h3><a href="<?php echo HTTP_ROOT.str_replace(' ', '-', 'videos').'/'.$item_tagname['tag_name'].'/'.str_replace(' ', '-', strtolower($item['pg_url']));?>"><?php if(strlen($item['pg_title']) > 20) echo substr($item['pg_title'], 0,20).'...'; else echo $item['pg_title'];?></a></h3>

    <p class="item-excerpt-video"><?php if(strlen($item['pg_content_2']) > 100) echo substr($item['pg_content_2'], 0,100).'...'; else echo $item['pg_content_2'];?></p>
    <a href="<?php echo HTTP_ROOT;?>videos" class="button-arrow"><span>More</span></a>
    <?php
    }
    ?>
</div>
<!-- side-video-library -->

Have I been implementing the class incorrectly??

thanks.

Answer 1

Probably the problem is that you have only a handful connections allowed and when your class tries to get a new connection you have this error.

This is not a programming problem, just quantity of resources available. And any other script that uses this class are subject to have the error.

You have to configure more connections on mysql config file on the server. If you don't have this access, ask the support to do it or change for a hosting company with more connections allowed!

Other option is to implement a Singleton pattern on this class, so it reuses same pool of connections, and don't explode the limit.

Answer 2

Check the MAX USER_CONNECTIONS setting on your MySQL server for the user. In PHPMyAdmin go to the server page (Click on the Server:<>) and in the sub-menu click on priviledges. Edit the user dbo343879423 and the MAX USER_CONNECTIONS will be on the right side. By default I believe it is set to 0 (unlimited), yours maybe restricted depending on who setup the server.

I'm not sure how your Database class is being used but if you are instantiating the class multiple times consider creating a private static variable Database in the database class and creating a public static method getDatabase() which instantiates the database connection if it is null and returns the instance.