Read an old article: PHP text station full Text Search

Full-Text Search <?php
/****************************************************
Original Author: Uchinaboy
Modification: Lingshidao
Features: No MySQL support, fast, no need to set the path, in which level of directory to search the directory and subdirectories, you can search for all text types of files, display file-related content, keywords automatically highlighted.
Modified content: Added automatic paging and styling files.
Search box code (if placed in the same directory search.php, do not need to modify): <form method= "POST" action= "search.php" ><input type= "text" name= "key" size =40 value= "" >
<input type= "Submit" value= "Search" ></form>
****************************************************/
Require ("template.php");
echo "<p align=\" Center\ ">";
echo "Search results";
echo "</p>if (function_exists ("Set_time_limit") &&!get_cfg_var (' Safe_mode ')) {
Set_time_limit (600);}
function Get_msg ($path) {
Global $key, $i;
$handle = Opendir ($path);
while ($filename = Readdir ($handle)) {
echo $path. " /". $filename." <br> ";
$newpath = $path. " /". $filename;
if (Is_file ($newpath)) {
$fp = fopen ($newpath, "R");
$msg = Fread ($fp, FileSize ($newpath));
Fclose ($FP);
Match_show ($key, $msg, $newpath, $filename);
}
if (Is_dir ($path.) /". $filename) && ($filename!=". ") && ($filename!=" ... ")) {
echo "<BR><BR><BR>". $newpath. " <BR><BR><BR> ";
Get_msg ($path. " /". $filename);
}
}
Closedir ($handle);
return $i;
}

function Match_show ($key, $msg, $newpath, $filename) {
Global $i;
$key = Chop ($key);
if ($key) {$check _type = Preg_match ("/\.html?$/", $filename);
if ($check _type) {$title = Gethtmltitle ($msg);}
$msg = Preg_replace ("/<style>.+<\/style>/is", "", $msg);
$msg = Preg_replace ("/<[^>]+>/", "", $msg);
$value = Preg_match ("/.* $key. */i", $msg, $res);
if ($value) {


if ($title) {$m = $title;} else {$m = $filename;}
$i + +;
$link = $newpath;
echo "$i. <a href=\" $link > $m </a><BR><BR> ";
}
}else {
echo "Please input keywords";
Exit
}
}

function Gethtmltitle ($msg) {

/* Locate where <title> is located in HTML file. */
$lBound = Strpos ($msg, ' <title> ') + 7; 7 is the lengh of <title>.

if ($lBound < 1)
Return

/* Locate where </TITLE> is located in HTML file. */
$uBound = Strpos ($msg, ' </title> ', $lBound);

if ($uBound < $lBound)
Return

/* Clean HTML and PHP tags out of $title with the madness below. */
$title = Ereg_replace ("[\t\n\r]", "", substr ($msg, $lBound, $uBound-$lBound));
$title = Trim (Strip_tags ($title));

if (strlen ($title) < 1)//a blank title is worthless.
Return

return $title;
}

$i = Get_msg (".");
echo "echo "has searched for $i message";
?>