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<?php $arr = null; var_dump($arr[0] ?? ""); $arr = 42; var_dump($arr[0] ?? "");
based on d7GkY
Output for 7.0.0 - 7.4.0
string(0) "" string(0) ""
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/9NvcY on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?' in /in/9NvcY on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/9NvcY on line 4
Process exited with code 255.