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<?php var_dump(isset('a', ['a' => null]));
Output for 5.4.0 - 5.4.31
Parse error: syntax error, unexpected ''a'' (T_CONSTANT_ENCAPSED_STRING) in /in/XUsG3 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /in/XUsG3 on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_STRING or T_VARIABLE or '$' in /in/XUsG3 on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_STRING or T_VARIABLE or '$' in /in/XUsG3 on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_VARIABLE or '$' in /in/XUsG3 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_VARIABLE or '$' in /in/XUsG3 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/XUsG3 on line 2
Process exited with code 255.

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