PHP - Function Called On A Non-object

Ok, so I don't really understand a lot about OOP. I was given a two big files full of classes and functions. We were hand coding this file for each use. My objective was to make an array we could use to ease the pain of coding these features.

Here is an example of what is happening to me. Can someone advise me conceptually on what to do.

Code: [Select]
include('Tons of files included here');

$myarray = array(
                             0 => array("question" => "answer"),
                             1 => array("question1" => "answer1")
                  );
class BigClass {
var $a
var $b
function fiststep(){
global $myarray;
                foreach($myarray as $anarray) {
$this->$anarray = new includedfunction1($anarray["question"]);
$this->$anarray->Values = array(array("yes", "yes"), array("no", "no"));
$this->$anarray->Multiple = true;
}
}
function nthstep(){
global $myarray;
                foreach($myarray as $anarray) {
$this->$anarray->astep();   // Error occurs: Call to a member function on a non-object
}
}
}

include('Tons of files included here');

There seem to be a number of steps that occur in one of the 10-20 include files before the data comes back to the nthstep. Once it comes back. I cannot seem to get it to be recognized as an object. If I were to manually type out the contents of $anarray. I get NO error. I am very over my head. Does anyone have a conceptual idea of my issue?

Hi Guys   I wonder if someone can explain something that is probably quite basic.   When I try to add an event listener and target a normal function this works fine - e.g. 'window.addEventListener('load',test)'.  However, if I try to target a function that is a property of an object this fails - e.g. 'window.addEventListener('load',initialiser.init)'. Further in this latter case I also get a console log saying it's undefined.   The code for this example is below.   So my question is why does it fail onload when I use a function in an object as opposed to a straight function? Presumably it's something to do with the way the document and the code are loaded or initialised but what is it that makes them behave differently.   Thanks,   Drongo

<script>
       
       //this function call works fine
       //window.addEventListener('load',test);

       //this functiton call fails and is undefined in console
	window.addEventListener('load',initialiser.init);
	
	//example object holding a method
	var initialiser = {
		
		init:function(){
			alert('Init called!');
		}
	};

	//some random function
	function test(){
	
		alert('test called!');
	}
</script>

Edited by Drongo_III, 18 May 2014 - 10:59 AM.

I am getting this error while building OOP portal. Fatal error: Call to a member function count() on a non-object in C:\Users\Rishi\Documents\xampp\htdocs\PDO\Pitch_It\index.php on line 6   My index.php file: <?php

Hi,
  I have the following class:

   

class User
    {  private $_db;
       
       public function __construct($user = null)
       {
          $this->_db = DB::getInstance();
           .......
       }
       public function find($user = null)
       { if($user)
         { $field = (is_numeric($user)) ? 'id' : 'username';
         $data = $this->_db->get('users', array($field, '=', $user));
           if($data->count())
           { .........
             return true;
           }
         }
         return false;
       }

In class DB I have:
   

public static function getInstance()
      { if(!(self::$_instance)): self::$_instance = new self();
        endif;
        return self::$_instance;
      }

public function get() in class DB, after processing, returns $this, the single instance of class DB, this is assigned to $data which is then used to invoke public function count(), a member function of class DB. I am getting the following error:  Fatal error: Call to a member function count() on a non-object.  I would be very grateful if someone can point out my mistake.

what's wrong in this line
$tpl->set('main_content',set_block($heading,'center',$err_tpl->fetch(load_template('error.tpl'))));

Hi
I did something in phpmyadmin the other day and I cant my site back to work. please see the attatched pdf with print screens of what I did.
Basically I was trying to add this: Code: [Select]
INSERT INTO `PP088_config_options` ( `id` , `category_name` , `name` , `value` , `config_handler_class` , `is_system` , `option_order` , `dev_comment` ) VALUES ( NULL , 'general', 'installation_base_language', 'se_se', 'StringConfigHandler', '0', '12', NULL
);
in one of the tables. When visiting www.konto.gradeup.se you will see the error message. I inserted the code from the DB.class.php file that I think is causing the problem.
Code: [Select]
*/
    static function escape($value) {
      return self::connection()->escapeValue($value);
    } // escape
   
    /**
    * Escape field / table name line 262 is the line with that starts with return self::connection
Thanks so much in advance. Im novice at phpmyadmin
Code: [Select]
<?php

  /**
  * This function holds open database connections and provides interface to them. It is also used
  * for SQL logging
  *
  * @version 1.0
  * @http://www.projectpier.org/
  */
  final class DB {
    
    /** ID of primary connection **/
    const PRIMARY_CONNECTION_ID = 'PRIMARY';
    
    /**
    * Collection of connections
    *
    * @var array
    */
    static private $connections = array();
    
    /**
    * ID of primary connection. This connection will be used if connection name is not suplied
    *
    * @var string
    */
    static private $primary_connection = self::PRIMARY_CONNECTION_ID;
    
    /**
    * SQL log
    *
    * @var array
    */
    static private $sql_log = array();
    
    /**
    * This function will return specific connection. If $connection_name is NULL primary connection will be used
    *
    * @access public
    * @param string $connection_name Connection name, if NULL primary connection will be used
    * @return AbstractDBAdapter
    */
    static function connection($connection_name = null) {
      if (is_null($connection_name)) {
        $connection_name = self::getPrimaryConnection();
      } // if
      return array_var(self::$connections, $connection_name);
    } // connection
    
    /**
    * Create new database connection
    *
    * @access public
    * @param string $adapter Adapter name (currently only mysql adapter is implemeted)
    * @param array $params Connection params
    * @param string $connection_name Name of the connection, if NULL default connection ID will be used
    * @return boolean
    * @throws FileDnxError
    * @throws DBAdapterDnx
    */
    static function connect($adapter, $params, $connection_name = null) {
      $connection_name = is_null($connection_name) || trim($connection_name) == '' ? 
        self::PRIMARY_CONNECTION_ID : 
        trim($connection_name);
        
      $adapter = self::connectAdapter($adapter, $params);
      if (($adapter instanceof AbstractDBAdapter) && $adapter->isConnected()) {
        self::$connections[$connection_name] = $adapter;
        return $adapter;
      } else {
        return null;
      } // if
      
    } // connect
    
    /**
    * This function will include adapter and try to connect. In case of error DBConnectError will be thrown
    *
    * @access public
    * @param string $adapter_name
    * @param array $params
    * @return AbstractDBAdapter
    * @throws DBAdapterDnx
    * @throws DBConnectError
    */
    private function connectAdapter($adapter_name, $params) {
      
      self::useAdapter($adapter_name);
      
      $adapter_class = self::getAdapterClass($adapter_name);
      if (!class_exists($adapter_class)) {
        throw new DBAdapterDnx($adapter_name, $adapter_class);
      } // if
      
      return new $adapter_class($params);
      
    } // connectAdapter
    
    /**
    * Figure out adapter location and include it
    *
    * @access public
    * @param string $adapter_class
    * @return void
    */
    private function useAdapter($adapter_name) {
      $adapter_class = self::getAdapterClass($adapter_name);
      $path = dirname(__FILE__) . "/adapters/$adapter_class.class.php";
      if (!is_readable($path)) {
        throw new FileDnxError($path);
      } // if
      include_once $path;
    } // useAdapter
    
    /**
    * Return class based on adapter name
    *
    * @access public
    * @param string $adapter_name
    * @return string
    */
    private function getAdapterClass($adapter_name) {
      return Inflector::camelize($adapter_name) . 'DBAdapter';
    } // getAdapterClass
    
    // ---------------------------------------------------
    //  Interface to primary adapter
    // ---------------------------------------------------
    
    /**
    * Try to execute query, ignore the result
    *
    * @access public
    * @param string $sql
    * @return true
    */
    static function attempt($sql) {
      $arguments = func_get_args();
      array_shift($arguments);
      $arguments = count($arguments) ? array_flat($arguments) : null;
      try {
        self::connection()->execute($sql, $arguments);
      } catch(Exception $e) {
      }
      return true;
    } // execute

    /**
    * Execute query and return result
    *
    * @access public
    * @param string $sql
    * @return DBResult
    * @throws DBQueryError
    */
    static function execute($sql) {
      $arguments = func_get_args();
      array_shift($arguments);
      $arguments = count($arguments) ? array_flat($arguments) : null;
      
      return self::connection()->execute($sql, $arguments);
    } // execute
    
    /**
    * Execute query and return first row from result
    *
    * @access public
    * @param string $sql
    * @return array
    * @throws DBQueryError
    */
    static function executeOne($sql) {
      $arguments = func_get_args();
      array_shift($arguments);
      $arguments = count($arguments) ? array_flat($arguments) : null;
      
      return self::connection()->executeOne($sql, $arguments);
    } // executeOne
    
    /**
    * Execute query and return all rows
    *
    * @access public
    * @param string $sql
    * @return array
    * @throws DBQueryError
    */
    static function executeAll($sql) {
      $arguments = func_get_args();
      array_shift($arguments);
      $arguments = count($arguments) ? array_flat($arguments) : null;
      
      return self::connection()->executeAll($sql, $arguments);
    } // executeAll
    
    /**
    * Start transaction
    *
    * @access public
    * @param void
    * @return boolean
    * @throws DBQueryError
    */
    static function beginWork() {
      return self::connection()->beginWork();
    } // beginWork
    
    /**
    * Commit transaction
    *
    * @access public
    * @param void
    * @return boolean
    * @throws DBQueryError
    */
    static function commit() {
      return self::connection()->commit();
    } // commit
    
    /**
    * Rollback transaction
    *
    * @access public
    * @param void
    * @return boolean
    * @throws DBQueryError
    */
    static function rollback() {
      return self::connection()->rollback();
    } // rollback
    
    /**
    * Return insert ID
    *
    * @access public
    * @param void
    * @return integer
    */
    static function lastInsertId() {
      return self::connection()->lastInsertId();
    } // lastInsertId
    
    /**
    * Return number of affected rows
    *
    * @access public
    * @param void
    * @return integer
    */
    static function affectedRows() {
      return self::connection()->affectedRows();
    } // affectedRows
    
    /**
    * Escape value
    *
    * @access public
    * @param mixed $value
    * @return string
    */
    static function escape($value) {
      return self::connection()->escapeValue($value);
    } // escape
    
    /**
    * Escape field / table name
    *
    * @access public
    * @param string $field
    * @return string
    */
    static function escapeField($field) {
      return self::connection()->escapeField($field);
    } // escapeField
    
    /**
    * Prepare string. Replace every '?' with matching escaped value
    *
    * @param string $sql
    * @param array $arguments Array of arguments
    * @return string
    */
    static function prepareString($sql, $arguments = null) {
      if (is_array($arguments) && count($arguments)) {
        foreach ($arguments as $argument) {
          $sql = str_replace_first('?', DB::escape($argument), $sql);
        } // foreach
      } // if
      return $sql;
    } // prepareString
    
    // ---------------------------------------------------
    //  Getters and setters
    // ---------------------------------------------------
    
    /**
    * Get primary_connection
    *
    * @access public
    * @param null
    * @return string
    */
    static function getPrimaryConnection() {
      return self::$primary_connection;
    } // getPrimaryConnection
    
    /**
    * Set primary_connection value
    *
    * @access public
    * @param string $value
    * @return null
    * @throws Error if connection does not exists
    */
    static function setPrimaryConnection($value) {
      if (!isset(self::$connections[$value])) {
        throw new Error("Connection '$value' does not exists");
      } // if
      self::$primary_connection = $value;
    } // setPrimaryConnection
    
    /**
    * Add query to SQL log
    *
    * @access public
    * @param string $sql
    * @return void
    */
    function addToSQLLog($sql) {
      self::$sql_log[] = $sql;
    } // addToSQLLog
    
    /**
    * Return SQL log
    *
    * @access public
    * @param void
    * @return array
    */
    function getSQLLog() {
      return self::$sql_log;
    } // getSQLLog
  
  } // DB

?>

Hi All,

My appologies in advance.  I am pretty sure that this has probably been answered before by someone...but for the life of me I carn't find the answer in any forums. 

My basic question is this.  Can you create an object at the beginning of a script, and then call its methods from within functions?

I have coded the following:



<?php

///import classes to use
require "booking_form_gui.php";

$booking = new booking_form_gui();

function _booking_form($form_state){
    
    ///$booking = new booking_form_gui();
   
    return $booking -> date_selection();         <----------this line causes the error I guess


}



The problem is that when I run this code, I get an error message similar to the following:

Fatal error: Call to a member function date_selection() on a non-object in /var/www/drupal_6/sites/default/modules/booking_system/booking_form/booking_form.module on line 127

Anyone any ideas how I could get round this? 

Thanks,

Mark.

i am really struggling and i have no idea  what to do.

Call to a member function stmt_init() on a non-object

on this code.
if (isset($_POST['insert'])) {
  require_once('includes/connection.php');
  // initialize flag
  $OK = false;
  // create database connection
  $conn = dbConnect('write');
  // initialize prepared statement
  $stmt = $conn->stmt_init();
  // create SQL

i am using a book but i have tried it many ways and the same error occurs.

i have looked on forums and they say that i have not set up  the users correctley. but for a test i give my user all the permitions that i could and same problem.

the error occurs on this line

$stmt = $conn->stmt_init();

with the error message stating 

Call to a member function stmt_init() on a non-object

please if you have seen this before could you help

thanks in advance

I am just trying out PDO and I get this error, Fatal error: Call to a member function fetch() on a non-object, but isn't it already on the $this->db object?

class shoutbox {

private $db;

function __construct($dbname, $username, $password, $host = "localhost" ) 
{ # db conections
try {
$this->db = new PDO("mysql:host=".$hostname.";dbname=".$dbname, $username, $password);
}
catch(PDOException $e)
{
echo $e->getMessage();
}
}

function getShouts()
{
$sql_shouts = $this->db->query('SELECT shoutid, message, pmuserid, ipadress, time FROM shouts WHERE pmuserid == 0');

return $sql_shouts->fetch(PDO::FETCH_OBJ);

}

}

Random Error that im getting on my webhost, not localhost.

Fatal error: Call to a member function fetch_assoc() on a non-object in /home/*****/index.php on line 127

Line 127:
while ($premium = $row->fetch_assoc()) {

Code:
<div class="toplist-content">
<table cellspacing="0">
<tbody>
<?php
$row = $home->getList(1);
while ($premium = $row->fetch_assoc()) {
?>
<tr class="table">
<td class="name"><a
href="server.html">
<h3>
<?php echo ucfirst($premium['servername']); ?>

</a> <font size='1.5'><?php echo ucfirst(substr($premium['serverdesc'],0,25)). "..."; ?>
</h3> </font>
</td>
<td class="revision"><h3>
<?php echo ucFirst($premium['revision']); ?>
</h3></td>
<td class="votes"><h3>
<?php echo $premium['vote']; ?>
</h3></td>
<td class="status"><?php 
if($home->getStatus($premium['host'], $premium['port']) == true) {
echo "<span class='ticket open'>Online</span>";
} else {
echo "<span class='ticket closed'>Offline</span>";
}
?>
</td>
</tr>
<?php } ?>
</tbody>
</table>
</div>


The getList() function :

function getList($premium) {
$query = $this->con->query("SELECT * FROM `".$this->prefix."servers` WHERE `premium` = '".$premium."' && `ban` = '0'
ORDER BY (SELECT COUNT(*) FROM `".$this->prefix."votes` WHERE `serverId` = '".$this->prefix."servers.id') DESC") or die(mysqli_error());
return $query;
}

I have a database called "mp_users" with the following setup:
Code: [Select]
CREATE TABLE IF NOT EXISTS `mp_users` (
  `id` int(10) unsigned default NULL auto_increment,
  `uid` int(10) unsigned NOT NULL,
  `username` varchar(100) NOT NULL,
  `email` varchar(50) NOT NULL,
  `points` int(10) unsigned NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
When I try to run the following query, I get an error:
Quote

SELECT COUNT(id) AS user_exists FROM `mp_users` WHERE uid=$uid LIMIT 1;


Error:
Fatal error: Call to a member function query() on a non-object in /home/user/public_html/marketplace-functions.php on line 52

Here is the code:
Code: [Select]
<?php
require_once "config.php";
$sql = new mysqli($db1['host'], $db1['user'], $db1['pass'], $db1['db']);
function checkUserExists($uid){
// Query
$q = "SELECT COUNT(id) AS user_exists FROM `mp_users` WHERE uid=$uid LIMIT 1;";
echo $q;
$q = $sql->query($q);
$r = $q->fetch_assoc();
// Any results?
if($r['user_exists'] == 0){
// redirect to runonce...
header('Location: marketplace.php?do=runonce&return='.urlencode($_SERVER['QUERY_STRING']));
exit();
}
}
?>
Line 52 is the $q query.

I really cannot see what the problem is. The database exists, I've tried it in phpMyAdmin and it runs without trouble, but this wont!

Can anyone help?
Thanks in advance

i am tring to extend from DataAccess to Module... but is showing an error:
location: Library/database.php

<?php
Class DatabaseAccess
{

public $db;
public $sqlQuery;

public function ConnectDB($host,$user,$password,$database){
$this->db = mysqli_connect($host,"",$password);
if (mysqli_connect_errno()) {
echo '<p>Cannot connect to DB: ' . mysqli_connect_error() . '</p>';
}
$this->db &= mysqli_select_db($this->db,$database);
}
public function SqlQuery($sql)
{
return mysqli_query($this->db,$sql);//or die("Error:".mysqli_error()."<br />The Query:<b>$sql</b>");
}

}
?>

The Module class
Location:Library/module.php

<?php
Class Module extends DatabaseAccess
{


public function DoInsert($tableName,$fields = array(),$values = array())//delete from table
{
$fields = implode(",", $fields);
$values = implode("','", $values);

return $this->db->SqlQuery ("INSERT INTO $tableName($fields) VALUES('$values')");//The error is here!!!!!!!!!!!!!!!!

}

}
?>

and the controller file name:
newProfile.php
this is the cdode

include "config.php";
include "Library/database.php";
include "Library/module.php";
$db = new DatabaseAccess;
$db->ConnectDB(MYSQL_HOST_NAME,MYSQL_USER_NAME,MYSQL_PASSWORD,MYSQL_DATABASE);//define in config.php
$db->Module = New Module;
$db->Module->DoInsert("twitter_profiles",
array(profile_user_name,profile_password,user_id),
array($_POST['userName'],$_POST['password'],$userID));//DoInsert(tableName,Fields,Values)
echo sysMessage("NewProfile.txt");

the error:

Fatal error:   /home/omerbsh/blalalala.com/tra/Library/module.php on line 59
the error is in the modle class where the comment: "The error is here!!!!!!!!!!!!!!!!"
its cant to fine SqlQuery object but why???

thanks

Hi,

i'm having a problem with some coding ive done not too sure why I am getting the following error message Fatal error: Call to a member function escapeValue() on a non-object /commonResources/php.lib/validateForm.class.php on line 82

At first I thought it was my database class object wasn't being created, but double checked and I have create a new object called $database of the database class.

Any ideas??

Code: [Select]
<?php
require_once ("/home/innova11/public_html/commonResources/dbConnection/dbConnection.php");
    class validateForm 
{
               public $email, $fName, $surname, $addressLine1, $townCity, $county, $postcode, $contactNum, $comments, $recaptchaVal;
public $resp;
public $error;
                function validateRecaptcha2($recaptchaVal)
{   
                        $this->recaptchaVal = $recaptchaVal;
if(empty($this->recaptchaVal))
                        {
                           return false;
                        }
                        else
                        {

                            $safe = $database->escapeValue($this->recaptchaVal);
                            $sql = "
                                    SELECT 
                                        *
                                    FROM 
                                        test
                                    WHERE 
                                        test = '".$safe."'
                                  ";
                            $results = $database->sqlQuery($sql);
                            if(mysql_num_rows($results)>0)
                            {
                                
                                return true; 
                            }
                            else
                            {
                                return false;
                            }
                        }
                  }

?>

When I use another class inside one class, I get this error

Quote

Call to a member function _safestring() on a non-object


The code is here
Code: [Select]
<?php

    require ('db.inc.php');
    $db = new db();
    
class common {
    
    function _cookiecheck() {
        if(!isset($_SESSION['username'])) {
            if(isset($_COOKIE['username'])&&isset($_COOKIE['password'])) {
                $pass = $db->_safestring($_COOKIE['password']);
                $user = $db->_safestring($_COOKIE['username']);
                $check = _query("select password from users where username='{$user}'");
                 if($check) {
                     $_SESSION['username'] = $user;
                 }
            }
        }
    }
    

}

?>
I get the error on the line when I call $db->_safestring();

Thanks for the help

I am changing my script from connecting to the database within every function, to using one connection (in the main class).

However, I am getting an error:
Call to a member function query() on a non-object

Here is  the main class:
<?php
class main{
// the configuration vars
public $config;
// the current user variables
public $uid = 0; // contains the user ID
public $gid = 0; // contains the group ID
// database variables
public $DB; // contains the connection
public $query_id; // contains the query ID
public $query_count; // how many queries have there been?
// cache variables
public $cache;
public $test = 'hi';
// initiate
public function __construct(){
}
// start up functions
public function startup(){
// first, set up the caching
if($this->config['use_memcache'] == true){
// start up cache
require_once('cache.class.php');
$this->cache = new cache_TS();
}
// now, set up the DB
$this->connectToDatabase();
// now, set up the user session
$this->setUserSession();
// are we logged in? If so, update our location
if($this->uid > 0){
// update location
$this->updateUserSession();
}
}
// connect to database
public function connectToDatabase(){
// connect to database
$this->DB = new mysqli($this->config['host'],$this->config['user'],$this->config['pass'],$this->config['db']);
// were we able to connect?
if(!isset($this->DB)){
// this is an error
exit('could not connect to the database.');
}
// test query
$q = "SELECT id,title FROM topics WHERE id='1' LIMIT 1;";
$q = $this->DB->query($q);
$r = $q->fetch_assoc();
echo $r['id'] . $r['title'];
// send back
return $this->DB;
}
// some removed....

The test query works fine.

It fails he
<?php
class forum extends main{
public function viewTopic($tid){
// Connect To Database
//$sql = new mysqli(db::$config['host'], db::$config['user'], db::$config['pass'], db::$config['db']);
// Get assorted details (topic, forum, etc)
// Get topic details
$tid = intval($tid);
$tq = "SELECT * FROM `topics` WHERE id='$tid' LIMIT 1";
$tq = $this->DB->query($tq);
$tr = $tq->fetch_assoc();

startup in main has already been called before forum is. The DB connects without failure.

Can anyone see what the problem is? How can I get $this->DB->query to work? (The query works fine when it's ran in the main class)