Online PHP editor | refs for uM352

<?php function calculateAccuracy($txPower, $rssi){ if ($rssi == 0) { return -1.0; // if we cannot determine accuracy, return -1. } $ratio = $rssi*1.0/$txPower; if ($ratio < 1.0) { return pow($ratio,10); } else { $accuracy = (0.89976)*pow($ratio,7.7095) + 0.111; return $accuracy; } } echo(calculateAccuracy(-55, -70).PHP_EOL); echo(calculateAccuracy(-56, -70).PHP_EOL); echo(calculateAccuracy(-57, -70).PHP_EOL);