从php数组中输出值

Array (
   [0] => Array ([username] => khaled [0] => khaled) 
   [1] => Array ([username] => Nariman [0] => Nariman) 
   [2] => Array ([username] => test1 [0] => test1) 
   [3] => Array ([username] => jack [0] => jack) 
   [4] => Array ([username] => mmmm [0] => mmmm) 
   [5] => Array ([username] => qqq [0] => qqq) 
   [6] => Array ([username] => wwwdwd [0] => wwwdwd) 
   [7] => Array ([username] => wddww [0] => wddww) 
   [8] => Array ([username] => maxa [0] => maxa) 
)

I tried $posts['username'][0]/[0]['username'] ... didnt work!

我试着美元的文章(“用户名”)[0]/[0](“用户名”)……没有工作!

I want to print out some values of the array, like the username for example. How to do it?

我想打印一些数组的值，比如用户名。如何去做?

3 个解决方案

#1

You can use the following solution using foreach:

使用foreach，您可以使用以下解决方案:

foreach ($arr as $arrItem) {
    echo $arrItem['username'];
    echo $arrItem[0];
}

You can also use a for loop:

你也可以使用for循环:

for ($i = 0; $i < count($arr); $i++) {
    echo $arr[$i]['username'];
    echo $arr[$i][0];
}

demo: https://ideone.com/he6h7r

演示:https://ideone.com/he6h7r

#2

To get a single variable (so your username in your case), you do the following:

要获得一个变量(因此，您的用户名在您的示例中)，您需要执行以下操作:

$username = $posts[0]['username'];

This will get the username from the first nested Array in your actual array. You can modify this to get every username from each nested array by making a for loop so you get the rest of the usernames.

这将从实际数组中的第一个嵌套数组中获取用户名。您可以通过创建一个for循环来修改它，以从每个嵌套数组中获取每个用户名，这样您就可以获得其余的用户名。

#3

On you array, key ['username'] does not exist.

在您的数组中，键['username']不存在。

If you indent the array, they read as this:

如果对数组进行缩进，它们会如下所示:

Array
  [0]
    [username] => khaled
    [0] => khaled
  [1]
    [username] => Nariman
    [0] => Nariman
...

Because this, you can read $posts[0][0] or $posts[0][username], but, you cant read $posts[username] because didn't exist.

因为，你可以读取$posts[0][0]或$posts[0][username]，但是，你不能读取$posts[username]，因为不存在。

#1