Question

I have this code:

$file = '/path/to/file.txt';

if (($fd = fopen($file, "a") !== false)) {
    fwrite($fd, 'message to be written' . "\n");
    fclose($fd);
}

Why do I get the following warnings?

fwrite(): supplied argument is not a valid stream resource
fclose(): supplied argument is not a valid stream resource

Answer 1

Your if statement is wrong. Try

if (($fd = fopen($file, "a")) !== false) {

Because yours one is like

$fd = fopen($file, "a") !== false