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function sed_bbcode_autourls($text)
{
global $usr;
if ($usr['maingrp']>0)
{
    $text = preg_replace('`(^|\s)(http|https|ftp)://([^\s"\'\[]+)`', '$1<a href="$2://$3">$2://$3</a>', $text);
    $text = preg_replace_callback('`(^|\s)(\w[\._\w\-]+@[\w\.\-]+\.[a-z]+)`', 'sed_obfuscate_eml', $text);
    return $text;
}
else
{
    $text = preg_replace('`(^|\s)(http|https|ftp)://([^\s"\'\[]+)`', 'nolink', $text);
    $text = preg_replace_callback('`(^|\s)(\w[\._\w\-]+@[\w\.\-]+\.[a-z]+)`', 'nolink', $text);
    return $text;
}
}