[php]Reading url [img] and [/img]

hylke · 08-22-2004, 02:25 PM

Hello
Im writing a script language that looks like bbcode, so far, i did evrything with str_replace.
But i also need pictures, so i have to read text between [img ] and [/img ](minus those spaces).
So how do i do that?I hope sb can help me.
thanx Hylke

Cedrik · 08-22-2004, 02:50 PM

Try preg_replace() like :

PHP Code:



$text = "Im writing a script language that looks like 

        bbcode [ img]http://image.com/smiley.png[ /img] so far,

        i did evrything with";

 
$img = preg_replace("/.*\\[img\\](.*)\\[\\/img\\].*/", "\\\\1", $text);

echo $img;

edit : hard to figure out how to display img markup properly

Charalambos · 08-22-2004, 03:25 PM

If you're not used to regular expression you can do something like this (not very clean solution though, i'd prefer reg expressions):

Code:

$newstring = strtr ( $inputstring, array("[ img ]" => "", "[ /img ]" => "") )

This will replace in inputstring the [ img ] and [ /img ] with an empty string (= remove it).
Like this you have in newstring just the content between the tags.

But nevertheless, if you really want to make it in a clean and much more elegant way, i suggest you to learn regular expressions (sooner or later you won't get around them anyway).

hylke · 08-23-2004, 03:40 AM

Thanks you all
Hylke

EDIT:
The code:

PHP Code:



 <?php

$text = "Im writing a script language that looks like

        bbcode [ img]http://image.com/smiley.png[ /img] so far,

        i did evrything with";

 
$img = preg_replace("/.*\[img\](.*)\[\/img\].*/", "\\1", $text);

echo $img;

?>

Gives me the following output:

Quote:

Im writing a script language that looks like bbcode [ img]http://image.com/smiley.png[ /img] so far, i did evrything with

So i gues there's something wrong with the code.

Charalambos · 08-23-2004, 03:52 AM

You have to remove the spaces in the [ img] and [ /img] tag.

edit: (because the regular expression matches the tags without spaces).

hylke · 08-23-2004, 05:09 AM

I've done that, but it simply removes those img tags, but i want only the url, and not all the other text.
Hylke

Charalambos · 08-23-2004, 05:11 AM

Thats exactly what it's supposed to.
It you want more to be removed, add the desired match to the regular expression.

hylke · 08-23-2004, 05:27 AM

How do i do that?
Because i dont understand how to do that with all those /,*/ and other signs.
Thanx Hylke

Charalambos · 08-23-2004, 06:37 AM

Thats what i told you, you should learn how regular expressions work and how their syntax is in order to get that one straight. Thats why i showed you the version above avoiding regular expressions (in case you don't want to learn).

Charalambos · 08-23-2004, 06:40 AM

And btw, you just have to take Cedrik's example and substitute the string that is replaces those tags, and you have what you're looking for (if not, i didn't understand what you were looking for, and you have to tell me again).

hylke · 08-23-2004, 06:51 AM

Sorry, but what does substitute mean?

Charalambos · 08-23-2004, 06:54 AM

Substitute = replace.
This means you just have to put the desired string instead of the one in the example.

Cedrik · 08-23-2004, 12:38 PM

In my system the regex give only the url, nothing more... try again (replace [image] by [img])

$text = "some words before [image]http://site.com/image.png[/image] some words after...";

$url = preg_replace("/.*\[image\](.*)\[\/image\].*/", "\\1", $text);
$echo $url;

hylke · 08-23-2004, 01:58 PM

Thanx