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Simply FAQ Script by Jeff Espiritu
Download this code

<center>
<!-- Start Bravenet.com Affiliate Code -->
<script language="JavaScript" src="http://www.bravenet.com/cserv.php?pid=4&tid=2&afilid=853055196"></script>
<!-- End Bravenet.com Affiliate Code -->
</center><br>
<?php
$err="";
$totfound=0;
if(!isset($idx)) $idx=0;
function QuestionHere($cnt,$Q)
{
    print "<b>$cnt. $Q</b><br>";
}

function AnswerHere($cnt,$A)
{
    print "$A <font size=1><br><br></font>";
}

//read all with .faq ext.
$currdir=getcwd();
$dir=@opendir($currdir);
if(!$dir) print "Error dir $currdir";
$aCategory=array();
$n=0;
while($file=@readdir($dir))
    {
    if(substr($file,-4)==".faq")
        {
        $aCategory[]=$file;
        //print substr($file,-4)." = $n. $aCategory[$n]<br>"; $n++;
        }
    }

sort($aCategory);
$nMaxCate=count($aCategory);

//Search
if(isset($searchtxt) && strlen($searchtxt)<3)
{
$err="Search at least 3 characters.";
$idx=-1;
$aFound=array();
}
elseif(isset($searchtxt) && $searchtxt!="")
{
$idx=-1;
$aFound=array();
for($a=0;$a<$nMaxCate;$a++)
    {
    $nFirst=0;
    $ccfile=$currdir."/".$aCategory[$a];
    $fp=@fopen($ccfile,"r");
    if(!@fp) {print "Error reading ".$currdir."/".$aCategory[$a]; exit;}
    $QorA=0;
    $cnt=1;
    $TempQ="";
    $okenter=0;
    while(!feof($fp))
        {
        $ln=fgets($fp,5000);
        if(trim($ln)!="")
            {

                if(stristr($ln,$searchtxt) || $okenter==1)
                {
                    if($nFirst==0) 
                    {
                        $cCate=str_replace("_"," ",$aCategory[$a]);
                        $cCate=substr(substr($cCate,1),0,-4);
                
                        $aFound[]="@CATEGORY@$cCate";
                        $nFirst=1;
                    }

            
                    if($QorA==0) //Question
                        {
                        $QorA=1;
                        $okenter=1;
                        $totfound++;
                        }
                    else
                        {
                        $QorA=0;
                        if($okenter==0) 
                            {
                            $totfound++;
                            $TempQ=str_replace($searchtxt,"<font color='000080'>$searchtxt</font>",$TempQ);
                            $aFound[]=$TempQ;
                            }
                        $okenter=0;
                        }
                    $ln=str_replace($searchtxt,"<font color='000080'>$searchtxt</font>",$ln);
                    $aFound[]=$ln;

                }
                else
                {
                    if($QorA==0) {$TempQ=$ln; $QorA=1;}
                    elseif($QorA==1) {$QorA=0; $TempQ="";}
                }
            }
    
        }
    }
}

?>


<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>FAQ</title>
<STYLE type="text/css">
<!--
A { text-decoration:none; color: #0000cc }
-->
</STYLE>

<style fprolloverstyle>A:hover {color: #cc0000;}</style>

</head>

<body>
<center>
<table border="0" width="750" style="font-family: Arial; font-size: 10pt" cellspacing="0" cellpadding="5">
  <tr>
    <td width="100%" bgcolor="#000080">
      <p align="center"><font color="#FFFFFF" size="4"><b>FAQ</b></font></td>
  </tr>
  <tr>
    <td width="100%">
      <p align="center"><b>Categories :</b><br>&nbsp; 

<?php
for($a=0;$a<$nMaxCate;$a++)
{
$cCate=str_replace("_","<font color=#ffffff>_</font>",$aCategory[$a]);
$cCate=substr(substr($cCate,1),0,-4);
$$cCate=strtoupper($file);

if($a==$idx) {print "[<b><font color='#008080'>$cCate</font></b>] &nbsp;"; $cSelectedCate=$cCate;}
else print "[<a href='faq.php?idx=$a'>$cCate</a>] &nbsp;";
}
?>

</p>
    </td>
  </tr>
  <tr>
    <td width="100%">
<form method="POST" action="faq.php">

      <p align="center"><b>Search :</b> 
        <input type="text" name="searchtxt" size="20" style="font-family: Arial; font-size: 8pt">
      <input type="submit" value="Go" name="Search" style="font-family: Arial; font-size: 8pt">
      </form>
      </p>
    </td>
  </tr>
  <tr>
    <td width="100%">
      <hr width="95%" size="1" color="#777777">


<?php 
if($idx>=0)
{
print "<font size='3' color='#008080'><b>$cSelectedCate<br><br></b></font>";

$fp=@fopen($aCategory[$idx],"r");
if(!$fp) {print "Error reading ".$currdir."/".$aCategory[$a]; exit;}
$QorA=0;
$cnt=1;
while(!feof($fp))
    {
    $ln=fgets($fp,500);
    if(trim($ln)!="")
        {
        if($QorA==0) {QuestionHere($cnt,$ln); $QorA=1;}
        else {AnswerHere($cnt,$ln); $QorA=0; $cnt++;}
        }
    }
}
else 
{ // SEARCH MODULE
$nMaxFound=count($aFound);

if($nMaxFound==0) 
{
if($err!="") print "<br><font color='cc0000'>$err</font>";
else print "No search found for <b>$searchtxt</b>";
}

else
    {
    print "<font color=#000080 size=3>Search \"<b>$searchtxt</b>\", found <b>$totfound</b> topics.<br></font>";
    $cnt=1;
    $QorA=0;
    for($a=0;$a<$nMaxFound;$a++)
        {
        if(substr($aFound[$a],0,10)=="@CATEGORY@")
            {
            $cSelectedCate=substr($aFound[$a],10);
            print "<br><font size='3' color='#008080'><b>$cSelectedCate<br></b></font>";    
            $QorA=0;        
            }
        else
            {
            if($QorA==0) {QuestionHere($cnt,$aFound[$a]); $QorA=1;}
            else {AnswerHere($cnt,$aFound[$a]); $QorA=0; $cnt++;}
            }        
        }

    }
}
?>

<br><br><font size=1>Powered by <a href='http://smallcapitalbusiness.com'>SmallCapitalBusiness.com</a></font>
</td>
  </tr>
</table>

</body>

</html>

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PX is running PHP 5.2.11
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Use of any code from PX is at your own risk.