PHP - 如何获取数组中的随机元素？

Question

$AllNums = array();
//array is { [0]=> string(1) "2" [1]=> string(1) "1" };

$RandNums = array_rand($AllNums, 1);
// var_dump($RandNums) show - int(0)

$Rand = $AllNums[$RandNums[0]];

but echo 'Rand = '.$Rand print on display Rand =.

Tell me please why we can not get $Rand?

Answer 1

array_rand($AllNums, 1); returns a value, not an array, so you don't have to add [0] in $Rand = $AllNums[$RandNums[0]];

$AllNums = range(1, 2);

$RandNums = array_rand($AllNums, 1);

$Rand = $AllNums[$RandNums];