fopen("w") creates file then fwrite on handle cause "Invalid Stream"

[MK27]

I'm trying to write debugging data to a file.  I open the file:

$dfile = fopen("debug/PHPdebug.txt","w") || die; 

The process continues, so $dfile is a valid handle (???)

 

Next I write to the file:

fwrite($dfile, "this data will not appear\n");

 

However, that data does not appear, and in the apache error log I get "PHP Warning:  fwrite(): supplied argument is not a valid stream resource".

 

The directory "debug" is owned by apache and set 755 (I've tried 777 too).  The file does get created each time. Just to be clear:  the fopen works, but the fwrite on the handle returned does not.

 

Why can I open a file and then not use the handle?  Googling for this issue is proving useless, since it's all people who's fopen() also failed because of permissions or whatever.

 

 

 

[PFMaBiSmAd]

Use OR instead of ||

 

Because || has a lower precedence than =, your code is or'ing the result of fopen() with die; (which is nothing) and assigning that to $dfile.

 

If you had error_reporting set to E_ALL, you would also see the following Warning that would help you track down what your code is doing -

 

Warning: fwrite() expects parameter 1 to be resource, boolean given in your_file.php on line x

[MK27]

OR instead of || (is lower than =) eh? LOL... That would explain why the value of $dfile was 1 when the file opened but zilch when the permissions were wrong.  Heh-heh.

 

Thanks much  PFMaBiSmAd.  I've set error_reporting to E_ALL, too, the more the merrier.