在php中组合两个数组

Question

I have two array in php and now I want to combine this two array as below.

$a1 = Array(
    'ansid4' => 4,
    'ansid5' => 5,
    'ansid6' => 6
);

$a2 = Array(
    'value' => 'demo',
    'value2' => 'demo2'
);

Required Output:

$target = Array(
    4 => 'demo',
    5 => 'demo2',
    6 => Null
);

Thanks in advance

Answer 1

$resultArray = array();

while ($key = array_pop($arrayOne)) {
  $resultArray[$key] = array_pop($arrayTwo);
}

or you could do

$resultArray = array();

foreach ($arrayOne as $key) {
  $resultArray[$key] = array_shift($arrayTwo);
}

Both solutions have the disadvantage that they consume one or both arrays. If you need them still after the combination you could make copies of the Arrays and have those consumed.