php - 使用键名但空值初始化关联数组

Question

我无法在书籍或网络上找到任何示例来描述如何仅通过名称(使用空值)正确初始化关联数组 - 当然，除非这是正确的方法(？)

感觉好像还有另一种更有效的方法:

config.php

class config {
    public static $database = array (
        'dbdriver' => '',
        'dbhost' => '',
        'dbname' => '',
        'dbuser' => '',
        'dbpass' => ''
    );
}

// Is this the right way to initialize an Associative Array with blank values?
// I know it works fine, but it just seems ... longer than necessary.

index.php

require config.php

config::$database['dbdriver'] = 'mysql';
config::$database['dbhost'] = 'localhost';
config::$database['dbname'] = 'test_database';
config::$database['dbuser'] = 'testing';
config::$database['dbpass'] = 'P@$$w0rd';

// This code is irrelevant, only to show that the above array NEEDS to have Key
// names, but Values that will be filled in by a user via a form, or whatever.

如有任何建议、建议或方向，我们将不胜感激。谢谢。

Answer 1

你所拥有的是最明确的选择。

但您可以使用 array_fill_keys 缩短它，像这样:

$database = array_fill_keys(
  array('dbdriver', 'dbhost', 'dbname', 'dbuser', 'dbpass'), '');

但如果用户必须填写值，您可以将数组留空，并在 index.php 中提供示例代码。分配值时会自动添加键。