This is in the changelog for pecl trader extension version 0.4.1. Previous versions used 2 arguments, now only one (see https://pecl.php.net/package-changelog.php?package=trader&release=0.4.1)
(PECL trader >= 0.2.0)
trader_ht_sine — Hilbert Transform - SineWave
$real
)
This function is currently not documented; only its argument list is available.
real
Returns an array with calculated data or false on failure.
This is in the changelog for pecl trader extension version 0.4.1. Previous versions used 2 arguments, now only one (see https://pecl.php.net/package-changelog.php?package=trader&release=0.4.1)
Documentation is missing a value
$hts = trader_ht_sine($a['open'],$a['close']);