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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); $ON = filter_var('ONb', FILTER_VALIDATE_BOOLEAN); var_dump($on, $true, $one, $ON);

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39.06 ms | 402 KiB | 5 Q