questo nn l'ho afferrato.... con il file di testo sto avendo degli errori:

Warning: include(venlinux/members/prova.txt) [function.include]: failed to open stream: No such file or directory in C:\Programmi\xampp\htdocs\venlinux\members\libchar t-1.2\demo\LineChartTest.php on line 26

Warning: include() [function.include]: Failed opening 'venlinux/members/prova.txt' for inclusion (include_path='.;C:\Programmi\xampp\php\pear\') in C:\Programmi\xampp\htdocs\venlinux\members\libchar t-1.2\demo\LineChartTest.php on line 26

Warning: fopen(venlinux/members/prova.txt) [function.fopen]: failed to open stream: No such file or directory in C:\Programmi\xampp\htdocs\venlinux\members\libchar t-1.2\demo\LineChartTest.php on line 27

Warning: fread(): supplied argument is not a valid stream resource in C:\Programmi\xampp\htdocs\venlinux\members\libchar t-1.2\demo\LineChartTest.php on line 28

cosa vuol dire????