[SOLVED] Basic preg-replace for bbcode

[DeanWhitehouse]

can someone show me the basic preg-replace for bbcode.

so when they enter

<center> or

it centers the text.

 

Thanks,

Blade

[JasonLewis]

Lol, you centered the text.

 

Like this:

$str = "
[center][b]Bold and centered text![/b][/center]
";

$str = preg_replace("/\[center\](.*?)\[\/center\]/","<center>\\1</center>",$str);
$str = preg_replace("/\[b\](.*?)\[\/b\]/","<b>\\1</b>",$str);

echo $str;

 

Here's a link to basic regular expression help in PHP:

http://www.sitepoint.com/article/regular-expressions-php

[DeanWhitehouse]

ok, thanks for that , now how can i search to see if the string contains any html code.

 

e.g

<center>

?

 

or do i not nead to , i want it so that if they enter

<center> or [center ]

it centers the text

[JasonLewis]

Um, well you wouldn't really want them to use HTML code, what exactly is it for?

[DeanWhitehouse]

forum, bbcode , i am planning on limiting what html they can use, to <center>,<b> etc. but i don't know how to search the string for it , strbck is the closet function i have seen

[JasonLewis]

You could just replace the [ and ] in the center preg_replace with < and >

 

Code:

$str = preg_replace("/\<center\>(.*?)\<\/center\>/","<center>\\1</center>",$str);

[DeanWhitehouse]

ok, last problem, i want to use this on lots of pages , from a forum, to members profiles.

 

how would i do this without writing it on every page , i was think something like

 

function bbcode(code)

{

$str = preg_replace("/\[center\](.*?)\[\/center\]/","<center>\\1</center>",code);

$str = preg_replace("/\[b\](.*?)\[\/b\]/","<b>\\1</b>",code);

}

 

then to call, i would do

bbcode(cake); ?? is that correct

[DeanWhitehouse]

Is this how i call from a function?

 

<?php 
function bbcode(code)
{
$str = preg_replace("/\[center\](.*?)\[\/center\]/","<center>\\1</center>",$str);
$str = preg_replace("/\[b\](.*?)\[\/b\]/","<b>\\1</b>",$str);
$str = preg_replace("/\<center\>(.*?)\<\/center\>/","<center>\\1</center>",$str);
}
echo bbcode([b]cake[/b])
?>

[JasonLewis]

I would use a return inside the function.

 

<?php 
function bbcode(code)
{
$str = preg_replace("/\[center\](.*?)\[\/center\]/","<center>\\1</center>",$str);
$str = preg_replace("/\[b\](.*?)\[\/b\]/","<b>\\1</b>",$str);
$str = preg_replace("/\<center\>(.*?)\<\/center\>/","<center>\\1</center>",$str);

return $str; //return the formatted string
}

$toformat = "
[center]Hello There! [b]How are you today?[/b][/center]
";
$toecho = bbcode($toformat);

echo $toecho;
?>