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<?php $a = []; $a = json_encode($a); var_dump($a); $a = json_encode($a); var_dump($a); var_dump(json_encode(['a'=>1])); echo $a; die;
based on 0Yq6T
Output for 5.4.0 - 7.2.0
string(2) "[]" string(4) ""[]"" string(7) "{"a":1}" "[]"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/PTgTv 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/PTgTv on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PTgTv on line 2
Process exited with code 255.