将多维数组合并到单个数组[重复]

Question

This question already has an answer here:

• Is there a function to extract a 'column' from an array in PHP? 13 answers

I have the following array structure

array (
  0 => 
  array (
    'ID' => '1',
    'post_title' => 'Hello world!',
  ),
  1 => 
  array (
    'ID' => '79',
    'post_title' => 'ffffffffffff',
  ),
  2 => 
  array (
    'ID' => '1720',
    'post_title' => 'Git primer',
  ),
)

I will love to convert it to a structure similar to the one below. Is there any php function that can do this? I am trying to avoid repetitive foreach loop.

array (
'1' => 'Hello world!',
'79' => 'ffffffffffff',
'1720' => 'Git primer',
)

</div>

Answer 1

Use array_column()to get this.

Array_column() function return all column name you have specify in parameter.

$array=array (
  0 => 
  array (
    'ID' => '1',
    'post_title' => 'Hello world!',
  ),
  1 => 
  array (
    'ID' => '79',
    'post_title' => 'ffffffffffff',
  ),
  2 => 
  array (
    'ID' => '1720',
    'post_title' => 'Git primer',
  ),
)
$new_array = array_column($array, 'post_title', 'ID');
print_r($new_array);

Output:

Array
(
    [1] => Hello world!
    [79] => ffffffffffff
    [1720] => Git primer
)