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<?php if($x instanceof $y);
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
Warning: Undefined variable $y in /in/UIMCj on line 3 Fatal error: Uncaught Error: Class name must be a valid object or a string in /in/UIMCj:3 Stack trace: #0 {main} thrown in /in/UIMCj on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: y in /in/UIMCj on line 3 Fatal error: Uncaught Error: Class name must be a valid object or a string in /in/UIMCj:3 Stack trace: #0 {main} thrown in /in/UIMCj on line 3
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Class name must be a valid object or a string in /in/UIMCj:3 Stack trace: #0 {main} thrown in /in/UIMCj on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Notice: Undefined variable: y in /in/UIMCj on line 3 Fatal error: Class name must be a valid object or a string in /in/UIMCj on line 3
Process exited with code 255.

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