数组直接相加

<?php
	$array1=array("a"=>"120","b"=>"300");
	$array2=array("a"=>"60","b"=>"56","c"=>"31","d"=>"35");
	$arrayMerge = $array1+$array2;
	print_r($arrayMerge);
?>

Array ( [a] => 120 [b] => 300 [c] => 31 [d] => 35 )

如果键名相同则不会发生覆盖.