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<?php $obj = new stdClass; $val = 'foo'; $obj->prop = &$val; var_dump($obj->prop ?? []);
Output for 7.0.33, 7.1.0 - 7.1.27, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
string(3) "foo"
Output for 5.6.38 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/iEDZc on line 6
Process exited with code 255.
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129.53 ms | 407 KiB | 5 Q