Merge two associative arrays without reindexing - PHP

Question

Without re-indexing how can I merge 2 associative arrays? I prefer not to use foreach or for loop, any better idea?

$a1=array(555=>array('name'=>'First Name','surname'=>'Second Name'), 888=>array('name'=>'New First Name','surname'=>'New Second Name'));
$a2=array(888=>array('invite'=>false), 555=>array('invite'=>true)); 
$result=array(555=>array('name'=>'First Name','surname'=>'Second Name', 'invite'=>true), 888=>array('name'=>'New First Name','surname'=>'New Second Name', 'invite'=>false));

Answer 1

use array_replace_recursive to add invite items to corresponding source array elements

array_replace_recursive($a1, $a2);

demo

Answer 2

使用array_merge函数或$a1 + $a2 。

Answer 3

You should use array_replace_recursive function

$a1=array(555=>array('name'=>'First Name','surname'=>'Second Name'), 888=>array('name'=>'New First Name','surname'=>'New Second Name'));
$a2=array(888=>array('invite'=>false), 555=>array('invite'=>true));
print_r(array_replace_recursive($a1, $a2));

This would print:

Array ( [555] => Array ( [name] => First Name [surname] => Second Name [invite] => 1 ) [888] => Array ( [name] => New First Name [surname] => New Second Name [invite] => ) )