yo usaba este para mi web, pero la elimine, tienes que editar las urls de los emoticones ;)
Código PHP:
function bbcode($row)
{
$row = str_replace("[citar]", "<blockquote><hr width='100%' size='2'>", $row);
$row = str_replace("[/citar]", "<hr width='100%' size='2'></blockquote>", $row);
$row = str_replace("[code]", "<code>", $row);
$row = str_replace("[/code]", "</code>", $row);
$row = str_replace("[img]", "<img src='", $row);
$row = str_replace("[/img]", "' alt='funny2be'>", $row);
$row = str_replace("[b]","<b>", $row);
$row = str_replace("[/b]","</b>", $row);
$row = str_replace("[i]","<i>", $row);
$row = str_replace("[/i]","</i>", $row);
$row = str_replace("[center]","<center>", $row);
$row = str_replace("[/center]","</center>", $row);
$row = str_replace("[u]","<u>", $row);
$row = str_replace("[/u]","</u>", $row);
$row = str_replace("[url]","<a href='", $row);
$row = str_replace("[/url]","'>", $row);
$row = str_replace("[youtube]","<iframe width='640' height='390' src='http://www.youtube.com/embed/", $row);
$row = str_replace("[/youtube]","' frameborder='0' allowfullscreen></iframe>", $row);
$row = str_replace(':S','<img alt="funny2be" src="http://funny2be.co.cc/imgaes/smilies/icon_confused.gif">', $row);
$row = str_replace(':(','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_frown.gif">', $row);
$row = str_replace('8)','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_cool.gif">', $row);
$row = str_replace(':D','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_biggrin.gif">', $row);
$row = str_replace(':O','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_eek.gif">', $row);
$row = str_replace(':mrgreen:','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_mrgreen.gif">', $row);
$row = str_replace(':wink:','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_wink.gif">', $row);
$row = str_replace(';)','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_wink.gif">', $row);
$row = str_replace('>:D)','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_twisted.gif">', $row);
$row = str_replace('>:()','<img alt="funny2be" src="http://funny2be.co.cc/images/smilies/icon_evil.gif">', $row);
return $row;
}
para llamarla es
Código PHP:
<?php
$texto="blablabla";
echo bbcode($texto);
?>