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run code in 300+ PHP versions simultaneously
<?php define( "xx", function() { return 1; } ); print(xx);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Object of class Closure could not be converted to string in /in/jaYLH:5 Stack trace: #0 {main} thrown in /in/jaYLH on line 5
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: define(): Argument #2 ($value) cannot be an object, Closure given in /in/jaYLH:3 Stack trace: #0 /in/jaYLH(3): define('xx', Object(Closure)) #1 {main} thrown in /in/jaYLH on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Constants may only evaluate to scalar values, arrays or resources in /in/jaYLH on line 3 Warning: Use of undefined constant xx - assumed 'xx' (this will throw an Error in a future version of PHP) in /in/jaYLH on line 5 xx
Output for 7.2.0 - 7.2.33
Warning: Constants may only evaluate to scalar values or arrays in /in/jaYLH on line 3 Warning: Use of undefined constant xx - assumed 'xx' (this will throw an Error in a future version of PHP) in /in/jaYLH on line 5 xx
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Warning: Constants may only evaluate to scalar values or arrays in /in/jaYLH on line 3 Notice: Use of undefined constant xx - assumed 'xx' in /in/jaYLH on line 5 xx
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: Constants may only evaluate to scalar values in /in/jaYLH on line 3 Notice: Use of undefined constant xx - assumed 'xx' in /in/jaYLH on line 5 xx

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