// do Dani's SEO optimization
global $session;
 
$search_array = array(
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;page=") . '([0-9]+)' . preg_quote("&amp;sort=") . '([a-z]*)' . preg_quote("&amp;order="). '([a-z]*)' . preg_quote("&amp;pp=") . '([0-9]*)' . preg_quote("&amp;daysprune="). '([^"]*)"#',
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;daysprune=") . '([^"]*)' . preg_quote("&amp;order=") . '([a-z]*)' . preg_quote("&amp;sort=") . '([a-z]*)' . preg_quote("&amp;pp=") . '([0-9]*)' . preg_quote("&amp;page=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;daysprune=") . '([^"^&]*)' . preg_quote("&amp;order=") . '([a-z]*)' . preg_quote("&amp;sort=") . '([a-z]*)"#',
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;daysprune="). '([^"^&]*)"#',
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;page=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"forumdisplay.php?$session[sessionurl]f=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]t=") . '([0-9]+)' . preg_quote("&amp;page=") . '([0-9]*)' . preg_quote("&amp;pp=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]t=") . '([0-9]+)' . preg_quote("&amp;page=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]t=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]goto=lastpost&amp;t=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]goto=newpost&amp;t=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"printthread.php?$session[sessionurl]t=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"sendmessage.php?$session[sessionurl]do=sendtofriend&amp;t=") . '([0-9]+)"#', 
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]t=") . '([0-9]+)' . preg_quote("&amp;goto=next"). '([a-z]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]p=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]p=") . '([0-9]+)' . preg_quote("&amp;page=") . '([0-9]+)' . preg_quote("&amp;pp=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showpost.php?$session[sessionurl]p=") . '([0-9]+)' . preg_quote("&amp;postcount=") . '([0-9]+)"#', 
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]mode=") . '([a-z]+)' . preg_quote("&amp;t=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"showthread.php?$session[sessionurl]p=") . '([0-9]+)' . preg_quote("&amp;mode=") . '([a-z]+)\##', 
 
'#<a ([^>]*)href' . preg_quote("=\"announcement.php?$session[sessionurl]f=") . '([0-9]+)' . preg_quote("&amp;announcementid=") . '([0-9]+)"#',
'#<a ([^>]*)href' . preg_quote("=\"announcement.php?$session[sessionurl]f=") . '([0-9]+)"#',
 
// sanitizing
'#<a ([^>]*)href\=\"([^"]*)&amp;page=([^"]*).html"#',
'#<a ([^>]*)href\=\"([^"]*)&amp;highlight=([^"]*).html"#',
 
// other
'#<a ([^>]*)href' . preg_quote("=\"search.php?$session[sessionurl]do=getdaily&amp;f=") . '([0-9]*)"#',
'#<a ([^>]*)href' . preg_quote("=\"search.php?$session[sessionurl]do=getdaily") . '"#',
'#<a ([^>]*)href' . preg_quote("=\"search.php?$session[sessionurl]do=process&amp;replyless=1&amp;replylimit=0&amp;dontcache=1&amp;forumchoice=&amp;childforums=1") . '"#',
'#<a ([^>]*)href' . preg_quote("=\"search.php?$session[sessionurl]do=process&amp;replyless=1&amp;replylimit=0&amp;dontcache=1&amp;forumchoice=") . '([0-9]+)' . preg_quote("&amp;childforums=1") . '"#'
 
);
$replace_array = array(
'<a \1href="f\2-\3-\4-\5-\6-\7.html"',
'<a \1href="f\2-\7-\5-\4-\6-\3.html"',
'<a \1href="f\2-\3-\4-\5.html"',
'<a \1href="f\2-\3.html"',
'<a \1href="f\2-\3.html"',
'<a \1href="f\2.html"',
'<a \1href="t\2-\3.html"',
'<a \1href="t\2-\3.html"',
'<a \1href="t\2.html"',
'<a \1href="lastpostinthread\2.html"',
'<a \1href="newpostinthread\2.html"',
'<a \1href="printthread\2.html"',
'<a \1href="sendthread\2.html"',
'<a \1href="next\3tothread\2.html"', 
'<a \1href="post\2.html"', 
'<a \1href="post\2-\3-\4.html"', 
'<a \1href="post\2-\3.html"', 
'<a \1href="t\3-\2.html"', 
'<a \1href="post\2-\3.html#', 
 
'<a \1href="announcement\2-\3.html"',
'<a \1href="announcement\2.html"',
 
// sanitizing
'<a \1href="\2-\3.html"',
'<a \1href="\2-\3.html"',
 
// other
'<a \1href="getdaily\2.html"',
'<a \1href="getdaily.html"',
'<a \1href="unanswered.html"',
'<a \1href="unanswered\2.html"'
 
);
$vartext = preg_replace($search_array, $replace_array, $vartext);

Options +FollowSymLinks
RewriteEngine on
RewriteRule ^getdaily.html$ search.php?do=getdaily [L]
RewriteRule ^getdaily([0-9]+).html$ search.php?do=getdaily&f=$1 [L]
RewriteRule ^unanswered.html$ search.php?do=process&replyless=1&replylimit=0&dontcache=1     [L]
RewriteRule ^unanswered([0-9]+).html$ search.php?do=process&replyless=1&replylimit=0&dontcache=1&forumchoice=$1&childforums=1 [L]
RewriteRule ^f([0-9]+).html$        forumdisplay.php?f=$1         [L]
RewriteRule ^f([0-9]+)-([0-9]+)-([a-z]+)-(.*)-([0-9]+)-(.*).html$ forumdisplay.php?f=$1&page=$2&sort=$3&order=$4&pp=$5&daysprune=$6 [L]
RewriteRule ^f([0-9]+)-(.*)-([a-z]+)-([a-z]+).html$    forumdisplay.php?f=$1&daysprune=$2&order=$3&sort=$4     [L]
RewriteRule ^announcement([0-9]+).html$     announcement.php?f=$1     [L]
RewriteRule ^announcement([0-9]+)-([0-9]+).html$    announcement.php?f=$1&announcementid=$2 [L]
RewriteRule ^t([0-9]+).html$     showthread.php?t=$1     [L]
RewriteRule ^t([0-9]+)-([0-9]+).html$    showthread.php?t=$1&page=$2     [L]
RewriteRule ^getnew.html$ search.php?do=getnew [L]
RewriteRule ^getnew([0-9]+).html$ search.php?do=getnew&f=$1 [L]
RewriteRule ^printthread([0-9]+).html$    printthread.php?t=$1     [L]
RewriteRule ^sendthread([0-9]+).html$    sendmessage.php?do=sendtofriend&t=$1 [L]
RewriteRule ^referthread([0-9]+)-([0-9]+).html$ showthread.php?t=$1&referrerid=$2    [L]
RewriteRule ^lastpostinthread([0-9]+).html$ showthread.php?goto=lastpost&t=$1 [L]
RewriteRule ^newpostinthread([0-9]+).html$ showthread.php?goto=newpost&t=$1 [L]
RewriteRule ^nextnewesttothread([0-9]+).html$    showthread.php?t=$1&goto=nextnewest    [L]
RewriteRule ^nextoldesttothread([0-9]+).html$    showthread.php?t=$1&goto=nextoldest    [L]
RewriteRule ^post([0-9]+).html$     showthread.php?p=$1     [L]
RewriteRule ^post([0-9]+)-([0-9]+).html$    showpost.php?p=$1&postcount=$2    [L]
RewriteRule ^post([0-9]+)-([0-9]+)-([0-9]+).html$ showthread.php?p=$1&page=$2&pp=$3    [L]
RewriteRule ^t([0-9]+)-([a-z]+).html$ showthread.php?mode=$2&t=$1    [L]
RewriteRule ^post([0-9]+)-([a-z]+).html$ showthread.php?p=$1&mode=$2    [L]