View file 2/3020.ru/system/functions/bbcode.php

<?php
  
FUNCTION BB_CODE($msg) {
  
  $bbcode = ARRAY(
    
    '/\[b\](.+)\[\/b\]/isU' => '<b>$1</b>',
    '/\[u\](.+)\[\/u\]/isU' => '<u>$1</u>',
    '/\[i\](.+)\[\/i\]/isU' => '<i>$1</i>',
    '/\[s\](.+)\[\/s\]/isU' => '<s>$1</s>',
    '/\[quote\](.+)\[\/quote\]/isU' => '<div style="padding: 5px; border-radius: 4px; background-color: #DBE7EC; color: #6C7275;">$1</div>'
    
    );
  
  $msg = PREG_REPLACE(ARRAY_KEYS($bbcode), ARRAY_VALUES($bbcode), $msg);
  
  RETURN $msg;

}

?>