What about using the filter_input function from php?
$orange = filter_input(INPUT_POST, 'orange', FILTER_VALIDATE_BOOLEAN);
Returns TRUE for "1", "true", "on" and "yes". Returns FALSE otherwise.
$orange = filter_input(INPUT_POST, 'orange', FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
If FILTER_NULL_ON_FAILURE is set, FALSE is returned only for "0", "false", "off", "no", and "", and NULL is returned for all non-boolean values.
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What about using the filter_input function from php?
Returns TRUE for "1", "true", "on" and "yes". Returns FALSE otherwise.
If FILTER_NULL_ON_FAILURE is set, FALSE is returned only for "0", "false", "off", "no", and "", and NULL is returned for all non-boolean values.