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HomeBackend DevelopmentPHP Tutorial 为啥这两个数组会打印不一样

为什么这两个数组会打印不一样。
$newsyids=1,3,5,8,7,5,3
$arr1= array($newsyids);
print_r($arr1);

$arr2= array(1,3,5,8,7,5,3);
print_r($arr2);

为什么这两个的打印结果不一样?
请高人指点?

打印arr1的情况是Array ( [0] => 1,3,5,8,7,5,3 )
打印arr2的啥情况是Array ( [0] => 1 [1] => 3 [2] => 5 [3] => 8 [4] => 7 [5] => 5 [6] => 3 )

我想arr1里面的是变量,同时打印结果钥匙arr2的样子,有啥办法吗?

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