A couple of coding related questions:

JimJamJammin

I have a number of problems and questions that I would be highly appreciative if they were answered.

How would I use a regular expression to replace occurances of [image]imagelink.gif[/image] with the HTML equivalent: <img src='imagelink.gif'>. Obviously I need someway to copy the image link part of the match, and use it when replacing the text.
I seem to be having problems with the 'double' type of value. I have three variables, one called $tolerance, one called $usersanswer and the other called $actualanswer. All variables have been converted to the 'double' type using the settype function ('float' is not on the older version of PHP).
'Tolerance' is how far away from the actual answer the user's answer is allowed to be.
Two new variables are formed: $lowerbound which is the actual answer minus the tolerance, and $upperbound which is the actual answer plus the tolerance.

To determine if the user's answer is within the 'acceptable range', I firstly use the following command: if($usersanswer-$lowerbound>=0)$correct=1;
If obviously do something similar with the upper bound also.
However this does not seem to work. Oddly, when I used the print function to display what $usersanswer-$lowerbound is, rather than a positive number, I got something like 4.3948720039872E-14.
Is this some sort of bug with PHP?

Any help warmly appreciated.
Thanks

Jamie Frost

sgoku01

Question #1:
You can use this:

$new_text = preg_replace("#\[img\](http(s)?://)([a-zA-Z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+]+)\[/img\]#", "<img src=\"\\1\\3\" border=\"0\">", $text_to_replace);

Question #2:
Can you post the source?

JimJamJammin

As for Question 2, the problem just suddenly fixed itself. Later when I tried the script again (without editing it) it just suddenly worked. It was probably something wrong with the server.

Unfortunately your code didn't seem to work.
All I want is to simply convert [image]x[/image] to <img src='x'>

Thanks for your help anyway!

sgoku01

mmm, strange that my code didn't worked, cause it works fine here.
You user right?? Else try this:

<?php
$text = "Bla bla [image]http://www.blah.com/image.jpg[/image]";
$text = bbcode($text);
echo $text;

function bbcode($edit) {
$edit = preg_replace("#[image](http(s)?://)([a-zA-Z0-9-.,?!%*_#:;~\&$@/=+]+)[/image]#", "<img src=\"\1\3\" border=\"0\">", $edit);

return $edit;
}
?>

You have to place an image between [image]link_to_image[/image] tags 🙂

JimJamJammin

I worked it out eventually. I found some similar code on www.php.net when looking at preg_replace. It was under the 'user-contributed notes'.

seby

this is more efficient:

$edit = preg_replace("/\[img\](.*?)\[\/img\]/si", "<img src=\"\\1\" border=\"0\">", $edit);

personally i use [img] for short, samething just less typing. change the tag to whatever you want.

edit: oh, you want to strip [url]http://[/url] as well?, misread that.