用 array_fill_keys 如何创建一个初始为空的用户权限表？PHP 实战解析

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</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>用 array_fill_keys 如何创建一个初始为空的用户权限表？PHP 实战解析</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在 PHP 开发中，我们经常需要为一组用户或者角色初始化权限表。假设有一个用户列表，每个用户初始的权限为空（或者默认值为 null），那么如何高效地生成这样的数组呢？PHP 提供了一个非常方便的函数：<code>array_fill_keys

\$users = ['alice', 'bob', 'charlie'];

\$permissions = array_fill_keys(\$users, []);

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</span><span><span class="function_ invoke__">print_r</span></span><span>(</span><span><span>$permissions</span></span><span>);
</span><span><span>echo</span></span><span> </span><span><span>"

\$permissions = array_fill_keys(\$users, ['read']);

"</span></span><span>;
</span><span><span class="function_ invoke__">print_r</span></span><span>(</span><span><span>$permissions</span></span><span>);
</span><span><span>echo</span></span><span> </span><span><span>"