Non riesco ad aprire le cartelle con fopen

[Giuggiolone]

Warning: fread(): supplied argument is not a valid File-Handle resource in c:\programmi\apache group\apache\test\read_file1.php on line 4

Warning: fread(): supplied argument is not a valid File-Handle resource in c:\programmi\apache group\apache\test\read_file1.php on line 5

Warning: fread(): supplied argument is not a valid File-Handle resource in c:\programmi\apache group\apache\test\read_file1.php on line 6


Non va.. non capisco.