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<?php echo filter_var('', FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE)
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected end of file, expecting ',' or ';' in /in/cTYQt on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end, expecting ',' or ';' in /in/cTYQt on line 3
Process exited with code 255.

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