所有数组成员的php字段[重复]

This question already has an answer here:

这个问题在这里已有答案：

I want to add sub arrays to one single array keep id and value in php 2 answers
我想将子数组添加到一个单独的数组中，在php 2答案中保持id和value

What I'm looking for is simple but I have no idea about what to search on google.

我正在寻找的很简单，但我不知道在谷歌上搜索什么。

I look for a simple PHP command to give me what I want without using loop:

我寻找一个简单的PHP命令，在不使用循环的情况下给我我想要的东西：

$myarray= [
     ['id'=>5,'username'=>'aaa','password'=>'.....'],
     ['id'=>6,'username'=>'bbb','password'=>'.....'],
     ['id'=>7,'username'=>'ccc','password'=>'.....'],
     ['id'=>8,'username'=>'ddd','password'=>'.....'],
];

What I want to obtain:

我想要获得的：

array('aaa','bbb','ccc','ddd')

Any simple way?

任何简单的方法？

2 个解决方案

#1

Use array_map (PHP 4 >= 4.0.6, PHP 5):

使用array_map（PHP 4> = 4.0.6，PHP 5）：

function get_usernames($a) {
    return $a['username'];
}

$values = array_map('get_usernames', $myarray);

#2

Have a look at array_column (this is available in >= PHP 5.5 [thanks for the tip kalley])

看看array_column（这在> = PHP 5.5中可用[感谢提示kalley]）

$myarray= [
    ['id'=>5,'username'=>'aaa','password'=>'.....'],
    ['id'=>6,'username'=>'bbb','password'=>'.....'],
    ['id'=>7,'username'=>'ccc','password'=>'.....'],
    ['id'=>8,'username'=>'ddd','password'=>'.....'],
];
$values = array_column($myarray, "username");

#1