php unset 数组不管用

$exchangeName= array (
    9000 =>
        array (
            0 => '正常充值1',
            1 => 4.99,
        ),
    9003 =>
        array (
            0 => '正常充值4',
            1 => 49.99,
        ),
    9152 =>
        array (
            0 => '一次性促销4',
            1 => 99.99,
        ),);
$qin = var_export($exchangeName);
//echo $qin;

$contents="444,name,0.99|555,name,9.99";
$packageArray=explode('|', $contents);

unset($exchangeName);
foreach ($packageArray as $packageValue){
 $temp=explode(',', $packageValue);
 $exchangeName[$temp[0]]=array($temp[1],$temp[2]);
}

echo var_export($exchangeName,true);

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你这下面不是有重新的赋值了吗

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unset是释放指定的变量。你直接unset二维数组肯定不行啊！参考手册