troubleshooting Question

Call to a member function on a non-object in

Avatar of fosiul01
fosiul01Flag for United Kingdom of Great Britain and Northern Ireland asked on
PHP
5 Comments1 Solution1371 ViewsLast Modified:
HI
Can i not call function  class function1 which is inside class1.class from  another function call funciton2 which is inside class2.class ??

if you can look at bellow code , its saying :Fatal error: Call to a member function query() on a non-object in.

Here I wrote a function( Register) to insert username and password in the table. This Register function is in UserAuthentication class.
problem is in :  query($sql); , which is actually a function from mysql.class

now i cant call this query($sql)  from Register function .

what i will have to do to call this function ??



'''''''''
UserAuthentication.class
''''''''''''''''''''
<?php
class UserAuthentication 
{ 
function register($username, $password, $UserEmail)
 	{
	
		// sql query to Select all username with the selected username provided by user
		$sql = "SELECT * FROM users where username = '$username'";
		$result = &$db->query($sql);  <<------------- problem---------------------
		
		Return true;
	
	}
 
}
 
?>
'''''''''''''''''
Register.php
''''''''''''''''''
<?php
require_once('../DBClass/MySQL.php');
require_once ('../DBClass/ConnectionString.php');
require_once('../DBClass/MySQLResult.php');
require_once('../DBClass/UserAuthentication.php');
$username = $_POST[Username];
$userpassword = $_POST[Userpassword1];
$userpassword2 = $_POST[Userpassword2];
$userEmail = $_POST[UserEmail];
// Creating object of UserAuthentication class
$ObjUserAuthentication = new UserAuthentication();
 
   $ObjUserAuthentication->register($username,$userpassword,$userEmail);
   ?>
  } 
?>
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