数组问题，想不出来好办法了,大家帮忙

Question

我找到了,用implode可以连成一个串,关键是第一问题,数组怎么相加呀???

Answer 1

<?php
$a[20050815]=array("para1"=>"1","para2"=>"2","para3"=>"3");
$b[20050815]=array("para1"=>"1","para2"=>"2","para3"=>"3");
$c[20050815]=array("para1"=>"1","para2"=>"2","para3"=>"3");
$sum[20050815] = array();
foreach($a[20050815] as $key=>$value)
{
$sum[20050815][] = $value + $b[20050815][$key] + $c[20050815][$key];
}
print_r($sum[20050815]);
$arrStr = implode(":",$sum[20050815]);
echo $arrStr;
?>

Answer 2

如果键值（$key)不同又怎么加？

Answer 3

$a[$key] $b[$key] $c[$key] $sum[$key]