将A和B添加到数组中

Question

如何添加＆＃34; A＆＃34;和＆＃34; B＆＃34;什么时候创建它们到数组？

Allready this：

$array1 = array("green", "red", "blue", "red");
$array2 = array("green", "yellow", "red");

想要此输出

$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green", "yellow", "red");

Answer 1

评论后编辑

$array1 = array("red","green","blue");
array_unshift($array1, "A");