trader_cdlengulfing() always returning false

From manual page: https://php.net/function.trader-cdlengulfing

This trader_cdlengulfing() needs to be updated as it returns false always, even when an engulfing pattern was submitted to it yet it returns false. same thing with most of trader candle sticks pattern detecting function.
Example:
// Previous candle (1st)
$prev_open = 25;
$prev_high = 30;
$prev_low = 20;
$prev_close = 22;

// Current candle (2nd)
$current_open = 18;
$current_high = 48;
$current_low = 15;
$current_close = 40;

$open = array($prev_open, $current_open);
$high = array($prev_high, $current_high);
$low = array($prev_low, $current_low);
$close = array($prev_close, $current_close);

$engulfing = trader_cdlengulfing($open, $high, $low, $close);
var_dump($engulfing);

Start with the trader_cdlengulfing() manual page linked in the issue and compare its documented behavior with the supplied PHP example. Determine whether the report requires a documentation correction or belongs in the underlying trader implementation; done means the discrepancy is resolved in the appropriate project and the other candle-pattern claims are scoped.