php - foreach 整数到数组中

Question

由于我是新手，我有一个问题

好吧，我在$nUserID哪里存储用户的 ID，就像

int(1)
int(2)
int(1)

在$nAuctionID我有物品ID，它们就像

int(150022)
int(150022)
int(150031)

我需要把它放在 1 个数组中，让它像

array (

[1] => 150022
[2] => 120022,150031

)

哪个用户哪个项目 ID 观看

怎么做 ？

我虽然应该使用 foreach ，但我无法想象会是什么样子

从...开始

 $u[] = $nUserID;
 $i[] = $nAuctionID;`

Answer 1

Grouping them by user ID, the following should result in what you're looking for.

$usersWatching = array();

// The following results in:
// array(1 => array(150022, 150023), 2 => array(150022))
// Which should be way more useful.
foreach ($nUserID as $i => $userID)
{
    if (!isset($usersWatching[$userID]))
        $usersWatching[$userID] = array();

    $usersWatching[$userID][] = $nAuctionID[$i];
}

// To get the comma-separated version, do this:
$usersWatching = array_map(function ($value) {
    return implode(',', $value);
}, $usersWatching);

Answer 2

这将起作用：

$arr = array();
foreach( $nUserID as $key=>$value)
{
   $arr[$value] =  $nAuctionID[$key] ;
}
print_r($arr);

Answer 3

最令人困惑的措辞问题EVA！

$outputArray = array();

for ($i=0; $i< count($nUserID); $i++) {
    $outputArray[$nUserID[$i]] = $nAuctionID[$i];
}

echo "<pre>";
print_r($outputArray);

这就是我从你的问题中得到的..