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<?php var_dump(empty(' ')); var_dump(isset(' ') && ' ' !== '');
Output for 8.5.0 - 8.5.10
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/R0X9Z on line 5 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.2.31 - 8.2.33, 8.3.0 - 8.3.33, 8.4.1 - 8.4.25
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/R0X9Z on line 5
Process exited with code 255.

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