Databases
StackOverflow2013
Postsdbo
POPHP classes misunderstandings
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POPHP classes misunderstandings
    primarykey
    data
    text
    <p>I'm trying to make a CMS and I'm stuck using classes in PHP.</p> <p>I have this little connection class and I don't know why it's not working. It's giving me the this error:</p> <blockquote> <p>Notice: Undefined variable: mysqli in C:\Users\eha\Desktop\Carlos' Stuff\xampp\htdocs\test\layout\system\class.php on line 4</p> <p>Fatal error: Cannot access empty property in C:\Users\eha\Desktop\Carlos' Stuff\xampp\htdocs\test\layout\system\class.php on line 4</p> </blockquote> <pre><code>class server_connect { function __construct($host, $user, $password, $database) { $this-&gt;$mysqli = new mysqli($host, $user, $password, $database); if ($mysqli-&gt;connect_error) { die('Connect Error (' . $mysqli-&gt;connect_errno . ') ' . $mysqli-&gt;connect_error); } } protected $mysqli = NULL; protected function set_connection(&amp;$serverconnect){ $this-&gt;$mysqli = $serverconnect; } } class site_manager extends server_connect { </code></pre> <p>ok now I get the syntax for that now when calling a parent element $mysqli Im doing parent::$mysqli and its telling me that its a undeclared variable</p> <pre><code>class site_manager extends server_connect { function __construct(&amp;$conect){ parent::set_connection($conect); } public function getContent($page , $sub){ if($page == 'home' || ($page != 'home' &amp;&amp; $sub ==NULL)) $qry = "SELECT * FROM public WHERE section = ?"; else $qry = "SELECT * FROM public WHERE section = ? AND subsection = ?"; $stmt = parent::$mysqli-&gt;stmt_init(); </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCarlos Arturo Alaniz
    1. USCarlos Arturo Alaniz
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COThat should be `$this->mysqli` throughout. You don't need the second `$` when referring to an object's attributes.
      singulars
      1. POPHP classes misunderstandings
      1. USandrewsi
    2. CODon't need, and in fact can't have. Unless you've defined the local variable `$mysqli`, `$this->$mysqli` effectively becomes `$this->{null}`, or `$this->{''}`. You only need the second `$` when you're using a variable's value as a property name.
      singulars
      1. POPHP classes misunderstandings
      1. UScHao
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload