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run code in 150+ php & hhvm versions
Bugs & Features
<?php file_put_contents('php://memory/foo', 'Hello'); echo file_get_contents('php://memory/foo');
based on dYhnA
Output for 5.2.7 - 5.6.28, 7.0.0 - 7.1.0
Warning: file_put_contents(): Invalid php:// URL specified in /in/mg6RI on line 3 Warning: file_put_contents(php://memory/foo): failed to open stream: operation failed in /in/mg6RI on line 3 Warning: file_get_contents(): Invalid php:// URL specified in /in/mg6RI on line 4 Warning: file_get_contents(php://memory/foo): failed to open stream: operation failed in /in/mg6RI on line 4
Output for hhvm-3.12.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.1 - 5.2.6
Warning: file_put_contents(): Invalid php:// URL specified in /in/mg6RI on line 3 Warning: file_put_contents(php://memory/foo): failed to open stream: Inappropriate ioctl for device in /in/mg6RI on line 3 Warning: file_get_contents(): Invalid php:// URL specified in /in/mg6RI on line 4 Warning: file_get_contents(php://memory/foo): failed to open stream: Inappropriate ioctl for device in /in/mg6RI on line 4
Output for 5.0.0 - 5.2.0
Warning: file_put_contents(php://memory/foo): failed to open stream: Inappropriate ioctl for device in /in/mg6RI on line 3 Warning: file_get_contents(php://memory/foo): failed to open stream: Inappropriate ioctl for device in /in/mg6RI on line 4
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: file_put_contents() in /in/mg6RI on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: file_put_contents() in /in/mg6RI on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: file_put_contents() in /in/mg6RI on line 3