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141.31 ms | 1399 KiB | 7 Q<?php
function diff($this, $that){
$diff = $this-$that;
while($diff < -180) $diff += 360;
while($diff > 180) $diff -= 360;
echo rad2deg($diff).PHP_EOL;
}
diff(359,1);//2
diff(-90,90);
//180