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run code in 300+ PHP versions simultaneously
<?php $f = function(){ echo 'blee'; }; $g = f; $f->__invoke(); $f(); $f->call($g);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "f" in /in/cCaJH:4 Stack trace: #0 {main} thrown in /in/cCaJH on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant f - assumed 'f' (this will throw an Error in a future version of PHP) in /in/cCaJH on line 4 bleeblee Warning: Closure::call() expects parameter 1 to be object, string given in /in/cCaJH on line 7
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant f - assumed 'f' in /in/cCaJH on line 4 bleeblee Warning: Closure::call() expects parameter 1 to be object, string given in /in/cCaJH on line 7
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Use of undefined constant f - assumed 'f' in /in/cCaJH on line 4 bleeblee Fatal error: Call to undefined method Closure::call() in /in/cCaJH on line 7
Process exited with code 255.

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