[SOLVED] Substring using preg_replace

[burhankhan]

Hi:

 

I want to remove sub string from a string.

 

Criteria is like this:

 

this is starting of string [tag][tag] here is some other code[/tag]here is some code[/tag] this is ending of string...

 

You can see in this string there are many nested [tags].

 

I just want to remove those all nested tags. And out put should be:

 

this is starting of string  this is ending of string...

 

I have tried many patterns but useless.

Any help will be highly appreciated.

 

Thanks

Burhan Khan

[effigy]

<pre>
<?php
$str = 'this is starting of string [b][tag][tag] here is some other code[/tag]here is some code[/tag][/b] this is ending of string...';
echo preg_replace('#\[(.+?)\].+?\[/\1\]#', '', $str);
?>
</pre>

[burhankhan]

I have tried your script but it is not working with this string:

 

 

 [quote][quote]this is quote 3[/quote]this is qutoe 2[/quote]this is in the quote

 

It should return this:

this is in the quote

 

But it is returning this:

 

this is qutoe 2[ /quote ]this is in the quote

 

Any suggestion?

[rea|and]

Try this code:

<?php 
$rex='/\[(\w+)\](?!.*?\[\\1\]).*?\[\/\\1\]/s';

while(preg_match($rex,$str,$mth))
  $str=str_replace($mth[0],'',$str);
?>

[burhankhan]

Thank rea|and, it is working