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<?php $hundred = 100; ini_set('assert.exception', 1); try { assert($hundred < 50); } catch (AssertionException $e) { var_dump($e);exit; echo $e->getMessage(); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught AssertionError: assert($hundred < 50) in /in/6cV9i:7 Stack trace: #0 /in/6cV9i(7): assert(false, 'assert($hundred...') #1 {main} thrown in /in/6cV9i on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: assert(): Assertion failed in /in/6cV9i on line 7

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