writing to the file opened for reading

[the_Igel]

Trying to get an error, but can't 🙂

Here's the code:

$file = fopen('output.html', 'r');

echo fwrite($file, 'test');

It reports neither error nor warning, echoes 0. error_reporting is on default level, i.e. enough to get a warning.

Any ideas?

[daynah]

fwrite() writes the contents of string to the file stream pointed to by fp. If the length argument is given, writing will stop after length bytes have been written or the end of string is reached, whichever comes first.

fwrite() returns the number of bytes written, or -1 on error.

I tested out your code:

<?
$file = fopen('output.html', 'r');

echo fwrite($file, 'test');

?>

returns 0

and

<?
$file = fopen('output.html', 'w');

echo fwrite($file, 'test');

?>

returns 4

I'm assuming it's returning 0 because 0 bytes were written to the file. The only way I could get an error is if I chmod the file to 700 so it's not able to read/write to the file.

I haven't seen anyone ask how come they don't get an error in a while. 😉

[malbera]

try without echo

[the_Igel]

Yes, 0 seems to be the number of bytes written, but I wonder why writing to that fp is considered legal. PHP should report a warning at least, in my opinion.