<?php function addRandomToN($n, $m) { $plus = mt_rand(0,1); if ($plus) { return $n + (($n*$m) * rand0To1()); } return $n - (($n*$m) * rand0To1()); } function rand0To1() { return (float)rand()/(float)getrandmax(); } echo addRandomToN(5, 0.1);
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