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<?php $first_test = null; $first_test ??= 'not started'; var_dump($first_test);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
string(11) "not started"
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=' in /in/GTN0r on line 4
Process exited with code 255.

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