PHP 将两个关联数组合并为一个数组 [英] PHP combine two associative arrays into one array

问题描述

$array1 = array("$name1" => "$id1");$array2 = array("$name2" => "$id2", "$name3" => "$id3");

我需要一个组合在一起的新数组，即

$array3 = array("$name1" => "$id1", "$name2" => "$id2", "$name3" => "$id3");

最好的方法是什么?

抱歉，我忘记了，id 永远不会相互匹配，但从技术上讲，名称可以，但不太可能，而且它们都需要列在一个数组中.我查看了 array_merge，但不确定这是否是最好的方法.另外，您将如何对其进行单元测试?

解决方案

array_merge() 效率更高，但有几个选项:

$array1 = array("id1" => "value1");$array2 = array("id2" => "value2", "id3" => "value3", "id4" => "value4");$array3 = array_merge($array1, $array2/*, $arrayN, $arrayN*/);$array4 = $array1 + $array2;echo '
';var_dump($array3);var_dump($array4);echo '</pre>';//结果:数组(4){[id1"]=>字符串(6)值1"[id2"]=>字符串(6)值2"[id3"]=>字符串(6)值3"[id4"]=>字符串(6)值4"}数组(4){[id1"]=>字符串(6)值1"[id2"]=>字符串(6)值2"[id3"]=>字符串(6)值3"[id4"]=>字符串(6)值4"}
$array1 = array("$name1" => "$id1");

$array2 = array("$name2" => "$id2", "$name3" => "$id3");
I need a new array combining all together, i.e. it would be
$array3 = array("$name1" => "$id1", "$name2" => "$id2", "$name3" => "$id3");
What is the best way to do this?

Sorry, I forgot, the ids will never match each other, but technically the names could, yet would not be likely, and they all need to be listed in one array.  I looked at array_merge but wasn't sure if that was best way to do this.  Also, how would you unit test this?
解决方案
array_merge() is more efficient but there are a couple of options:
$array1 = array("id1" => "value1");

$array2 = array("id2" => "value2", "id3" => "value3", "id4" => "value4");

$array3 = array_merge($array1, $array2/*, $arrayN, $arrayN*/);
$array4 = $array1 + $array2;

echo '<pre>';
var_dump($array3);
var_dump($array4);
echo '</pre>';


// Results:
    array(4) {
      ["id1"]=>
      string(6) "value1"
      ["id2"]=>
      string(6) "value2"
      ["id3"]=>
      string(6) "value3"
      ["id4"]=>
      string(6) "value4"
    }
    array(4) {
      ["id1"]=>
      string(6) "value1"
      ["id2"]=>
      string(6) "value2"
      ["id3"]=>
      string(6) "value3"
      ["id4"]=>
      string(6) "value4"
    }


                        
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