// в какой директории файлы
$dir    = 'test';
$files0 = array();
$files1 = scandir($dir);

echo "<pre>";
//var_dump($files1);
echo "</pre>";

$CountFiles1 = count($files1);

for ($i = 0; $i < $CountFiles1; $i++) {
    $htm = preg_match('/\.html$/', $files1[$i]);
    if($htm == 0){unset($files1[$i]);}
}

sort($files1);

$CountFiles2 = count($files1);

$title = array();
for ($i = 0; $i < $CountFiles2; $i++) {

    $filename = "$dir/$files1[$i]";
    $handle = fopen("$filename", "r");
        $contents = fread($handle, filesize($filename));
         
        $match_a = '/<title>(.+?)<\/title>/ism';
        $run_title = preg_match_all($match_a, $contents, $i_a);
    
        $i_a[1][0] .= "|<a href=\"http://{$_SERVER['HTTP_HOST']}/$filename\">$files1[$i]</a>";
        $title[] = $i_a[1][0];
    fclose($handle);
   
    $contents = null;
}

sort($title);
$CountTitle = count($title);


for ($i = 0; $i < $CountTitle; $i++) {
    $DoubleTitle = explode("|", $title[$i]);
        echo "$DoubleTitle[0] ";
        echo "$DoubleTitle[1]<br>";
    
    //echo "$title[$i]<br>";
}