绑定具有相同ID的数组

Question

我有一个像这样的PHP数组：

Array
(
[0] => Array
    (
        [option_id] => 21
        [header_image] => logo.png
    )

[1] => Array
    (
        [option_id] => 21
        [menu1] => About
    )

[2] => Array
    (
        [option_id] => 22
        [menu2] => Speaker
    )

[3] => Array
    (
        [option_id] => 22
        [menu3] => Agenda
    )

[4] => Array
    (
        [option_id] => 22
        [menu4] => Venue
    )

[5] => Array
    (
        [option_id] => 23
        [menu5] => Hotel
    )

[6] => Array
    (
        [option_id] => 23
        [menu6] => Sponsors
    )
)

我想要这样的数组：

Array
(
[0] => Array
    (
        [option_id] => 21
        [header_image] => logo.png
        [menu1] => About
    )

[1] => Array
    (
        [option_id] => 22
        [menu2] => Speaker
        [menu3] => Agenda
        [menu4] => Venue
    )

[2] => Array
    (
        [option_id] => 23
        [menu5] => Hotel
        [menu6] => Sponsors
    )

   )

我想绑定具有相同option_id的数组。  我怎样才能做到这一点？

Answer 1

您需要使用foreach

循环数组

<?php
$output = array();
if (! empty($arr)) {
  foreach ($arr as $elem) {
    if (! empty($elem)) {
      foreach ($elem as $k => $v) {
        $output[$elem['option_id']][$k] = $v;
      }
    }
  }
}