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<?php $hello = null; $hello ??= 'not_null_anmymore'; echo $hello;
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
not_null_anmymore
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=' in /in/cJTMU on line 5
Process exited with code 255.

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