Question

After ages of programming in php this question seems really weird still to me.

I want to make a file writable dinamically to not have problem with permissions in production / development …. but it still gives me trouble.

Can someone gives me explanation on what am I wrong?

// permissions    -- the folder writable by www-data
//drwxrwxrwx 2 www-data www-data  4096 mag 24 12:19 Details

// then the file not writable by the owner
-r----x--t 1 www-data www-data 0 giu  8 12:48 /home/giuseppe/homeProj//Ariprova/trunk/PhpCsv/phpcsv/ConfigClasses/Helpers/Virtuemart2/Details/324-PartsToAdd.json

// then the code

if (!file_exists($fileRequest)) {   // it's found
                throw new Exception ('File non trovato. Nome File completo: '.$fileRequest. ' con cartella '.  getcwd()); 
                }  

if (!is_writable($fileRequest)) {
                $results = @chmod($fileRequest, '0777');  //this gives true 

            }

            $fileReq = fopen($fileRequest, 'w');
            fwrite($fileReq, 'a string' );   // this writes nothing on file

            fclose($fileReq);

Answer 1

Change chmod($fileRequest, '0777') to chmod($fileRequest, 0777). The string '0777' will be converted to a numeric value, which will be 777 decimal, which is not what you expect; what you really want is 0777 octal.