phpBB extension code confuse me

[YoOoster]

As someone who programmed in Java, C#, C++, C and even dabbled in Assembly you would think that this wouldn't be too hard to understand...
So maybe someone here can help me understand how to make an extension.

I've already typed out some stuff while trying to figure it out, but this is pretty much what I want below each topic (the topic_id is just an example):

Code: Select all

$sql = "SELECT attach_id FROM phpbb_attachments WHERE topic_id = 1762 ORDER BY attach_id DESC LIMIT 5";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
	echo "<br>";
	echo "<div style=\"height:100px;display:inline-block;\">";
	// output data of each row
	while($row = $result->fetch_assoc()) {
		echo "<img src=\"/forum/download/file.php?id=" . $row["attach_id"]. "&t=1\" style=\"display:inline-block;width:100px;height:100px;\"/>";
	}
echo "</div>";
}
$conn->close();

I know that I would need to make an topiclist_row_append.html and probably do something like

Code: Select all

for each image
show the image

and I'll probably need to get the images via the controller, but I have no idea how to do it and how you would "bind" those two things together.

I've already looked at the acme demo, hello world extensions and tried with the skeleton extension. Even looked at extensions that use topiclist_row_append.html but I'm at a loss.

[rxu]

Did you try extension development tutorials? https://area51.phpbb.com/docs/dev/3.2.x/extensions/

[david63]

or the Extension Skeleton extension?

[battye]

You will need to access the event variable which contains the templating vars that you want to modify (or add to). That's what "binds" the main logic to the view.

For example, see what I did at https://github.com/battye/show-subforum ... ORUM_IMAGE

I wanted to add that new templating var "U_SUBFORUM_IMAGE", but I had to access the event and then add my own var, then save it back to the original event var before I could use it in the HTML.

[YoOoster]

You will need to access the event variable which contains the templating vars that you want to modify (or add to). That's what "binds" the main logic to the view.

For example, see what I did at https://github.com/battye/show-subforum ... ORUM_IMAGE

I wanted to add that new templating var "U_SUBFORUM_IMAGE", but I had to access the event and then add my own var, then save it back to the original event var before I could use it in the HTML.

Thank you, this explanation and with your code it actually makes a lot of more sense.

One question about your code. You do this to get the subforum ids

Code: Select all

$query_string = parse_url($subforum['U_SUBFORUM'], PHP_URL_QUERY);
parse_str($query_string, $output);
$forum_id = (int) $output['f'];

Aren't you able to get the subforum 'object' and then just use FORUM_ID? Or is this out of the scope of the display_forums_modify_template_vars event?

Also what's the best way to determine the most logical event to use, because I assume you could add the same things via multiple events if you wanted too.

[david63]

Also what's the best way to determine the most logical event to use, because I assume you could add the same things via multiple events if you wanted too.

Trial and error first followed by experience