/**
* 求多个数组的并集
*/
function array_union()
{
$argsCount = func_num_args();
if ($argsCount < 2)
{
return false;
}
else if (2 == $argsCount)
{
list($arr1, $arr2) = func_get_args();
while (list($k, $v) = each($arr2))
{
if (!in_array($v, $arr1)) $arr1[] = $v;
}
return [...]
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