array 用 php 组合三个或更多数组 [英] array combine three or more arrays with php

问题描述

好的，假设我有 5 个数组，全部都是索引数组，我想将它们组合起来，这是我能想到的最好方法，有没有更好的方法来处理这个问题?

ok, assuming I have 5 arrays, all just indexed arrays, and I would like to combine them, this is the best way I can figure, is there a better way to handle this?

function mymap_arrays(){
    $args=func_get_args();
    $key=array_shift($args);
    return array_combine($key,$args);
}
$keys=array('u1','u2','u3');
$names=array('Bob','Fred','Joe');
$emails=array('[e-mail]','[e-mail]','[e-mail]');
$ids=array(1,2,3);
$u_keys=array_fill(0,count($names),array('name','email','id'));
$users=array_combine($keys,array_map('mymap_arrays',$u_keys,$names,$emails,$ids));

返回:

Array
(
    [u1] => Array
        (
            [name] => Bob
            [email] => [e-mail]
            [id] => 1
        )

    [u2] => Array
        (
            [name] => Fred
            [email] => [e-mail]
            [id] => 2
        )

    [u3] => Array
        (
            [name] => Joe
            [email] => [e-mail]
            [id] => 3
        )

)

经过大量基准测试后，我使用了一个版本的 Glass Robots 来处理可变数量的数组，它显然比他的要慢，但比我原来的要快:

After lots of benchmarking I wend with a version of Glass Robots answer to handle a variable number of arrays, it's slower than his obviously, but faster than my original:

function test_my_new(){
    $args=func_get_args();
    $keys=array_shift($args);
    $vkeys=array_shift($args);
    $results=array();
    foreach($args as $key=>$array){
        $vkey=array_shift($vkeys);
        foreach($array as $akey=>$val){
            $result[$keys[$akey]][$vkey]=$val;
        }
    }
    return $result;
}
$keys=array('u1','u2','u3');
$names=array('Bob','Fred','Joe');
$emails=array('[e-mail]','[e-mail]','[e-mail]');
$ids=array(1,2,3);
$vkeys=array('name','email','id');
test_my_new($keys,$vkeys,$names,$emails,$ids);

推荐答案

就个人而言，我会这样做:

Personally for readability I would do it this way:

$keys   = array('u1','u2','u3');
$names  = array('Bob','Fred','Joe');
$emails = array('[e-mail]','[e-mail]','[e-mail]');
$ids    = array(1,2,3);
$result = array();

foreach ($keys as $id => $key) {
    $result[$key] = array(
        'name'  => $names[$id],
        'email' => $emails[$id],
        'id'    => $ids[$id],
    );
}

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