[  0][Sat May 25 11:05:07 -0500 -- alvarezp@alvarezp-samsung:~]
$ php -f <(echo '<?php print("hello\n"); ?>')
?php print("hello\n"); ?>

[  0][Sat May 25 11:05:11 -0500 -- alvarezp@alvarezp-samsung:~]
$ php -f <(echo ' <?php print("hello\n"); ?>')
hello

[  0][Sat May 25 11:05:19 -0500 -- alvarezp@alvarezp-samsung:~]
$ php -f <(echo -- '<?php print("hello\n"); ?>')
- hello