PHP：如何合并子数组？

Question

我：

$colors = array(
    'apple' => array('green', 'red'), 
    'grape' => array('green', 'purple'), 
); 

$countries = array(
    'apple' => array('china', 'usa') 
    'grape' => array('spain', 'france') 
); 

预期输出：

$result = array(
    'apple' => array('green', 'red', 'china', 'usa'), 
    'grape' => array('green', 'purple', 'spain', 'france'), 
); 

我怎样才能做到这一点？

Answer 1

$result = array_merge_recursive($colors, $countries); 

了解更多：http://php.net/manual/en/function.array-merge-recursive.php

Answer 2

希望这个最简单的将有所帮助。

Try this code snippet here

<?php 

$colors = array(
    'apple' => array('green', 'red'), 
    'grape' => array('green', 'purple'), 
); 

$countries = array(
    'apple' => array('china', 'usa'), 
    'grape' => array('spain', 'france') 
); 
foreach($colors as $key => &$value) 
{ 
    $value=array_merge($value,$countries[$key]); 
} 
print_r($colors);