Question

How to segregate even and odd numbers of an array (even on left and odd on right) in PHP

Answer 1

function swap(&$arr, $i, $j) {
	$temp = $arr[$i];
	$arr[$i] = $arr[$j];
	$arr[$j] = $temp;
}

function segregateElement(&$arr) {
	$size = count($arr);
	
	$j = 0;
	for ($i = 0; $i < $size; $i++) {
		if ($arr[$i] % 2 == 0) {
			swap($arr, $j, $i);
			$j++;
		}
	}
}

$arr = array(1, 3, 4, 5, 7, 10, 13, 6, 9, 8);

segregateElement($arr);

echo implode(" ", $arr);



/*
run:
    
4 10 6 8 7 3 13 1 9 5
    
*/

 

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