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<?php echo 'boolean filter:' . PHP_EOL; $on = filter_var('on', FILTER_VALIDATE_BOOLEAN); $true = filter_var('true', FILTER_VALIDATE_BOOLEAN); $one = filter_var('1', FILTER_VALIDATE_BOOLEAN); $ONv = filter_var('ON', FILTER_VALIDATE_BOOLEAN); var_dump($on, $true, $one, $ON);
Output for git.master, git.master_jit, rfc.property-hooks
boolean filter: Warning: Undefined variable $ON in /in/1JhZY on line 9 bool(true) bool(true) bool(true) NULL

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