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run code in 300+ PHP versions simultaneously
<?php echo "${strtolower(HELLO)}";
Output for 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/nqFDS on line 3 Fatal error: Uncaught Error: Undefined constant "HELLO" in /in/nqFDS:3 Stack trace: #0 {main} thrown in /in/nqFDS on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught Error: Undefined constant "HELLO" in /in/nqFDS:3 Stack trace: #0 {main} thrown in /in/nqFDS on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Warning: Use of undefined constant HELLO - assumed 'HELLO' (this will throw an Error in a future version of PHP) in /in/nqFDS on line 3 Notice: Undefined variable: hello in /in/nqFDS on line 3
Output for 7.3.32 - 7.3.33
Warning: Use of undefined constant HELLO - assumed 'HELLO' (this will throw an Error in a future version of PHP) in /in/nqFDS on line 3
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant HELLO - assumed 'HELLO' in /in/nqFDS on line 3 Notice: Undefined variable: hello in /in/nqFDS on line 3
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '(' in /in/nqFDS on line 3
Process exited with code 255.

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