The CLISAPI defines a few constants for I/O streams to make programming for the command line a bit easier.
Constant | Description |
---|---|
STDIN | An already opened stream to <?php stdin , you can use <?php |
STDOUT | An already opened stream to <?php |
STDERR | An already opened stream to <?php |
Given the above, you don't need to open e.g. a stream for stderr
yourself but simply use the constant instead of the stream resource:
php -r 'fwrite(STDERR, "stderr\n");'
Note:
These constants are not available if reading the PHP script from
stdin
.