17 lines
620 B
PHP
17 lines
620 B
PHP
function median($arr)
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{
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sort($arr);
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$count = count($arr); //count the number of values in array
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$middleval = floor(($count-1)/2); // find the middle value, or the lowest middle value
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if ($count % 2) { // odd number, middle is the median
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$median = $arr[$middleval];
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} else { // even number, calculate avg of 2 medians
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$low = $arr[$middleval];
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$high = $arr[$middleval+1];
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$median = (($low+$high)/2);
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}
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return $median;
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}
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echo median(array(4.1, 5.6, 7.2, 1.7, 9.3, 4.4, 3.2)) . "\n"; // 4.4
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echo median(array(4.1, 7.2, 1.7, 9.3, 4.4, 3.2)) . "\n"; // 4.25
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