Help with regex

[eevan79]

1). How to replace text with 3 tags:

1.

[ img ]

2.

images/smilies/smiley.gif

3.

[ /img] 

 

with "smiley.gif"  ?

 

example:

[img=http://...images/smilies/smiley.gif]  ->  smiley.gif

 

2). How to check if message contains only spaces? In script I allowed minmum 5 characters to post message. But when I press <space> 5 times I can post message. How to strip/wrap blank spaces?

[wildteen88]

1). How to replace text with 3 tags:

1.

[ img ]

2.

images/smilies/smiley.gif

3.

[ /img] 

 

with "smiley.gif"  ?

 

example:

[img=http://...images/smilies/smiley.gif]  ->  smiley.gif

You'd use regex. Here is an example

$str = '[img=http://...images/smilies/smiley.gif]';

$str = preg_replace('/\[img\](.*)\[\/img\]/i', '<img src="$1" />', $str);

echo $str;

 

How to strip/wrap blank spaces?

Use trim

[eevan79]

Thanks.

In fact, that's what I did, but I made a mistake.

 

I just needed to put this code before I parse bbcode (html2bbcode).

What about second question - how to remove spaces if there is more than 3 in row (example "  ")?

 

EDIT:

for first question:

Do I have to change all smilies, or can I get just filename and remove link and BBC tags? Example from and I want to get smiley.gif ...

[ZachMEdwards]

function doublesapce($str) {
   while(strpos($str, '  ')) {
      $str = str_replace('  ', ' ', $str);
   }
   return $str;
}

[eevan79]

Thanks for answer, but that doesnt solve problem.

 

When I write 20 spaces and one character script counts 21 characters. If I write only spaces script doesnt allow to post less than 3 characters.

 

So I can post if I type "                            1 ", but not "                        ".

Can I fix this with regex?

[wildteen88]

Reduce multiple spaces with regex

$str = 'h              e                                             l                                   l                                o                      !';
$new_str = preg_replace('/\s+/', ' ', $str);

echo "<pre>$str\n". strlen($str) . "\n\n$new_str\n" . strlen($new_str) . "</pre>";