Menu given class

Menu given class

<ul class="menu">
  <?php 
    // get a string with all li of the next html
    $menu = "<li><a href="."'".$_path.$_SESSION['lang']."'".">".$home."</a></li>";

    $sql = mysqli_query($connexion, "SELECT * FROM menu WHERE etat=1 ORDER BY position ASC");
    $rel = 0;
    
    if(mysqli_num_rows($sql)>0):
    while($row = mysqli_fetch_object($sql)){
      $id = $row->id;
      $post = $row->post;
      $plugins = $row->plugins;
      $plug = "SELECT alias, alias_en FROM plugins where id = '".$plugins."'";
      if($plugins!=0):
        $plug = mysqli_query($connexion, $plug);
        $row_plug = mysqli_fetch_object($plug);
        $alias_plug = $row_plug->$alias_lang;
        mysqli_free_result($plug);
      else:
        $alias_plug = "";
      endif;
      
      if($post!=0):
        $sql_p ="SELECT * FROM page where id = '".$post."'";
        $sql_p = mysqli_query($connexion,$sql_p);
        $row_p = mysqli_fetch_object($sql_p);
        $alias_post = $row_p->$alias_lang;
        $id_post = $row_p->id;
        $alias_post=preg_replace("# #","-",$alias_post);
        mysqli_free_result($sql_p);
      else:
        $alias_post = "";
      endif;

      if(isset($alias_post) && ($alias_post!="")):
        $href = $_path.$row->id."-".$alias_post;
      elseif(isset($alias_plug) && ($alias_plug!="")):
        $href = $_path.$alias_plug;
      else:
        $href = "page-undefined";
      endif;

      $menu .= "<li><a href="."'".$href."'".">".$row->$titre_lang."</a></li>";
      $rel++; 
    } 
    mysqli_free_result($sql);
    endif;
    $menu .= "<li class='last'><a href='".$_path."contact'>Contact</a></li>";

    $lines = preg_split("#<li#", $menu);
    $lines = array_filter($lines);
  	foreach ($lines as &$value)
		    $value = '<li'.$value;

    // get the url of the browser
    $url=$_SERVER["REQUEST_URI"];
    // remove the domain
    $path = parse_url($url, PHP_URL_PATH);
    // fragment the url with the /
    $pathFragments = explode('/', $path);
    // get last fragment of url
    $end = end($pathFragments);
    // loop inside the array of each menu line 
    foreach ($lines as $line) {
      $current = false;
      // get the value of the url from the line, put the value in variable match
			$url = preg_match('/<a href=\'(.+)\'>/', $line, $match);
	    // parse the value url, put the value in array
			$info = parse_url($match[1]); 
      $link = explode('/', $info['path']);
      $link = end($link);
      if (in_array($link, $pathFragments)) {
	    // if ($end == $info['path']) {
	    	// if end url equal href menu, add the class current to the line
	      $line = str_replace('<a h', '<a class="current" h', $line);
	    }
      // write the line
      echo $line."\n";
    }
  ?>
</ul>