求一个数组中序列连续数的最大值

<?php
$array = array(-2,1,3,9,-4,2,3,5,-3,-4,1,3);
$maxsum = 0;
$thissum = 0;
for ($i=0; $i <count($array) ; $i++) { 
	$thissum+=$array[$i];
	if ($thissum>$maxsum) {
		$maxsum=$thissum;
	}elseif ($thissum<0) {
		$thissum=0;
	}
}
echo $maxsum;
?>

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