我该如何合并PHP数组？ [英] How can I merge PHP arrays?

问题描述

我有动物（例如）的两个数组。

I have two arrays of animals (for example).

$array = array(
    array(
    	'id' => 1,
    	'name' => 'Cat',
    ),
    array(
    	'id' => 2,
    	'name' => 'Mouse',
    )
);

$array2 = array(
    array(
    	'id' => 2,
    	'age' => 321,
    ),
    array(
    	'id' => 1,
    	'age' => 123,
    )
);

我如何才能通过该ID的两个数组合并成一个？

How can I merge the two arrays into one by the ID?

推荐答案

这做什么埃里克建议（ID编号为数组键），并合并在 $数组2 vlaues到 $结果。

This does what Erik suggested (id no. as array key) and merges vlaues in $array2 to $results.

$results = array();

foreach($array as $subarray)
{
    $results[$subarray['id']] = array('name' => $subarray['name']);
}

foreach($array2 as $subarray)
{
    if(array_key_exists($subarray['id'], $results))
    {
        // Loop through $subarray would go here if you have extra 
        $results[$subarray['id']]['age'] = $subarray['age'];
    }
}

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