PHP：将一个数组的值设置为另一个数组

Question

I want to create a new array, and set its keys equal to the values of another array.

Start:

$names = array("don","james","jennifer","paul");
$ages = array("don" => 25, "paul" => 32);

Finish:

$name_age_map = array(
 "don" => 25,
 "james" => null,
 "jennifer" => null,
 "paul" => 32,
);

How should this be done in PHP? This is the best I've got so far:

$name_age_map = array();
foreach ($names as $name) {
  $name_age_map[$name] = $name_map[$name]; 
}

Ideally I wouldn't even create a new array, I'd just give element in $names a value of the age.

Answer 1

array_merge(
   array_combine(
       $names,
       array_fill(0,count($names),NULL)
   ),
   $ages);