test1.php

<?php
	$arr = array(1,2,3,4,5,6,7,8,9,10);
	$arrLess = array();
	$arrGret = array();
	
	$total = 0;
	$nuEle = count($arr);
	foreach ($arr as $arr_ele){
		$total += $arr_ele;
	}
	$avg = $total/$nuEle;
	
	foreach ($arr as $arr_ele) {
		if ($arr_ele > $avg) {
			array_push($arrGret, $arr_ele);
		} elseif ($arr_ele < $avg) {
			array_push($arrLess, $arr_ele);
		}
	}
?>