php create file in a new directory

Question

I need create a new txt file in a new directory. I do thi code

$path="dir1";
mkdir("$path",0777);

$path1="dir1/dir2";
mkdir("$path1",0777);

$path2="dir1/dir2/dir3";
mkdir("$path2",0777);


$percorso=$path.$path1.$path2;

$var=fopen($percorso."/nome_file.txt","a+");
fwrite($var, "stringa di prova");

It creates the 3 directory dir1/dir2/dir3 on my server but not the file. why?

Answer 1

$path="dir1";
mkdir("$path",0777);

$path1="dir1/dir2";
mkdir("$path1",0777);

$path2="dir1/dir2/dir3";
mkdir("$path2",0777);


$percorso=$path2;

$var=fopen($percorso."/nome_file.txt","a+");
fwrite($var, "stringa di prova");