php find element in array.php

<?php
//$arr = array(10, -1, 10, -1, 4, 5, 0);
$arr = array(-3, 0, -4);
$brr = array();
for($i = 0, $n = count($arr); $i < $n; ++$i) {
	$a = abs($arr[$i]);
	if ($a) {
		$brr[] = $a;
	}
}

sort($brr);

$rs = count($brr) > 0 ? $brr[0] : 0;
$as = $rs;

if ($rs) {
	$neg = true;
	for($i = 0, $n = count($arr); $i < $n; ++$i) {
		$j = $arr[$i];
		$a = abs($j);
		if ($a == $rs) {
			$as = $j;
			if ($j > 0 && $neg) {
				$neg = false;
				break;
			}
		}
	}	
}

echo $as;