problema nel passaggio di variabile a fopen()

[alby_mo]

Questo è l'intero codice del file in php:

<?php

    //$name=$_POST['name'];
    $name="111111";
    $filename=$name.".xml";
    $dir="./images/".$name;
    $filealbum="./images/albums.xml";
    $album=$dir."/".$filename;
    $bool=false;
    $boolo=false;
    $answer="";
    
    if(@dir($dir))
    {
        $boolo=false;
        check($bool);
    }
    else
    {
        $boolo=true;
        $bool=true;
        mkdir($dir, 0777);
        f_exists($filealbum);
        //check($bool);
    }    

    function f_exists($filealbum)
    {
        if(!file_exists($filealbum))
        {    
            fopen("./images/albums.xml", "w+");
            chmod("./images/albums.xml", 0775);
            $bool=true;
        }
        else
        {
            $answer="file already exist";
        }
        
        xml_creator($album);
    }
    
    function xml_creator($album)
    {
        if(!file_exists($album))
        {    
            $new_xml=fopen("$album","w");
            $bool=true;
        }
        else
        {
            $bool=false;
            $answer="The file $album exists";
        }
        check($bool);
    }
    
    function check($bool)
    {
        if($bool&&$boolo)
        {
            $answer="ok";
            echo ("answer=".$answer);
        }
        else
        {
            $answer="no";
            echo ("answer=".$answer);
        }
    }
?>