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<?php var_dump(trait_exists(1, 2, 3));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught ArgumentCountError: trait_exists() expects at most 2 arguments, 3 given in /in/XpHmh:3 Stack trace: #0 /in/XpHmh(3): trait_exists(1, 2, 3) #1 {main} thrown in /in/XpHmh on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: trait_exists() expects at most 2 parameters, 3 given in /in/XpHmh on line 3 NULL
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Fatal error: Call to undefined function trait_exists() in /in/XpHmh on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: trait_exists() in /in/XpHmh on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: trait_exists() in /in/XpHmh on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: trait_exists() in /in/XpHmh on line 3

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