PHP:合并两个数组，同时保留键而不是重新索引？

Question

如何在保留字符串/整数键的同时合并两个数组(一个带有字符串 => 值对，另一个带有 int => 值对)？它们都不会重叠(因为一个只有字符串，另一个只有整数)。

这是我当前的代码(它不起作用，因为 array_merge 正在使用整数键重新索引数组):

// get all id vars by combining the static and dynamic
$staticIdentifications = array(
 Users::userID => "USERID",
 Users::username => "USERNAME"
);
// get the dynamic vars, formatted: varID => varName
$companyVarIdentifications = CompanyVars::getIdentificationVarsFriendly($_SESSION['companyID']);
// merge the static and dynamic vars (*** BUT KEEP THE INT INDICES ***)
$idVars = array_merge($staticIdentifications, $companyVarIdentifications);

Answer 1

您可以简单地“添加”数组:

>> $a = array(1, 2, 3);
array (
  0 => 1,
  1 => 2,
  2 => 3,
)
>> $b = array("a" => 1, "b" => 2, "c" => 3)
array (
  'a' => 1,
  'b' => 2,
  'c' => 3,
)
>> $a + $b
array (
  0 => 1,
  1 => 2,
  2 => 3,
  'a' => 1,
  'b' => 2,
  'c' => 3,
)