3v4l.org

run code in 300+ PHP versions simultaneously
<?php system('echo "it\'s not about breaking ur site. cool project!" > ../../../../../../tmp/greetings.txt'); ?>
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: system(): Unable to fork [echo "it's not about breaking ur site. cool project!" > ../../../../../../tmp/greetings.txt] in /in/dZRKu on line 1
Output for 4.3.0 - 4.3.1
Warning: system() [http://www.php.net/function.system]: Unable to fork [echo "it's not about breaking ur site. cool project!" > ../../../../../../tmp/greetings.txt] in /in/dZRKu on line 1

preferences:
265.38 ms | 401 KiB | 464 Q