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<?php $a = array('foo' => ['bar' => 'baz']); var_dump(@$a['foo']['bar'] ?: 'xxx'); var_dump(@$a['foo']['baz'] ?: 'xxx');
Output for 5.4.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(3) "baz" string(3) "xxx"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ljWLU on line 2
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/ljWLU on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ljWLU on line 2
Process exited with code 255.