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<?php $a = array_fill_keys([1.5], 'hello'); $b = [1.5 => 'hello']; var_dump([$a, $b]); var_dump([$a[1.5], $b[1.5]);
Output for 5.4.0 - 5.4.38
Parse error: syntax error, unexpected ')', expecting ']' in /in/o1Wn0 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/o1Wn0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/o1Wn0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/o1Wn0 on line 3
Process exited with code 255.
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