StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POInstantiation in extended classes
primarykey
Id
9823990
data
AcceptedAnswerId
9824164
AnswerCount
2
ClosedDate
CommentCount
7
CommunityOwnedDate
CreationDate
2012-03-22T14:11:13.770
FavoriteCount
0
LastActivityDate
2012-03-22T19:25:16.517
LastEditDate
2012-03-22T19:25:16.517
LastEditorUserId
618349
OwnerUserId
618349
ParentId
0
PostTypeId
1
Score
0
ViewCount
633
LastEditorDisplayName
text
Body
I am working on a custom framework and have a couple of questions about parent class instantiation through child classes. I will paste some code snippets and then get into the questions <pre><code>class CFrameWork { private $applicationName = "Application Name"; function __construct($instance = "development") { echo "Hello, I am the Parent and I have been constructed "; } public function startApplication() { $this->checkMaintenanceMode(); if (!isset($_GET['query'])) { $this->intialize(); } else { // Call the appropriate controller // Method and function are pulled from the query // Code not displayed // EDITS BELOW if (method_exists($method, $function)) { try { call_user_func(array(new $method, $function), $this); } catch (CFException $exp) { $this->show404(); exit; } } else { $this->show404(); exit; } } } } </code></pre> Next we have a controller class <pre><code>class childController extends CFrameWork { function index() { echo "Index Controller"; } function register() { echo "Registration Controller"; } } </code></pre> Now in the index.php, I have <pre><code>$application = new CFrameWork(); $application->startApplication(); </code></pre> The way this Framework interprets queries: <blockquote> localhost/childController/index - Calls the index() function in class childController localhost/childController/register - Calls the register() function in class childController </blockquote> and so on... So here's my concern. The parent class in this framework in instansiated twice each time a controller method is called. Once by the index.php (where the initial application is created) and then by the controller when it is extended. IN other words, CFrameWork::__construct() is created again everytime a controller method is reached. My questions: <blockquote> 1) Does this have any harmful effect? 2) Can this be avoided? 3) Any suggestions on how you would do this differently? </blockquote>
Tags
<oop><php-5.3><php>
Title
Instantiation in extended classes
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USRohit Chopra
UserOwnerUserId
1. USRohit Chopra
plurals
PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
2. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

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.