PHP -嵌套数组

Question

从这个全局变量：

echo '<pre>';
print_r($wp_registered_sidebars);
echo '</pre>';

我得到了这样的输出：

Array
(
    [sidebar-1] => Array
        (
            [name] => Main Sidebar
            [id] => sidebar-1
            [description] => text
            [before_widget] => 
            [after_widget] => 
            [before_title] => 
            [after_title] =>
        )

    [sidebar-2] => Array
        (
            [name] => Footer Sidebar 1
            [id] => sidebar-2
            [description] => text
            [before_widget] => 
            [after_widget] => 
            [before_title] => 
            [after_title] =>
        )

    [sidebar-3] => Array
        (
            [name] => Footer Sidebar 2
            [id] => sidebar-3
            [description] => text
            [before_widget] => 
            [after_widget] => 
            [before_title] => 
            [after_title] =>
        )
)

我不知道有多少侧边栏，以及它们是如何命名的。

有没有办法：

• 只列出所有侧栏IDs侧栏- 1，边栏- 2，侧栏-3，
• 只列出所有侧栏名-主侧边栏，页脚边栏1，页脚边栏2，

谢谢!

Answer 1

$resultSlideBars = array();
foreach($wp_registered_sidebars as $slidebars)
{
   $resultSlideBars[$slidebars['id']] = $slidebars['name'];    // will store array as array(id => name

}

// ids 
echo implode(' ', array_keys($resultSlideBars)); 
echo implode(' ', $resultSlideBars);   // echo names

或

foreach($wp_registered_sidebars as $slidebars)
{
   echo $slidebars['id'];      // echo id 
   echo $slidebars['name'];    // echo name
}

Answer 2

foreach(array_keys($wp_registered_sidebars) as $sidebarID) {
    echo $sidebarID;
}

foreach($wp_registered_sidebars as $sidebar) {
    echo $sidebar['name'];
}

Answer 3

$sidebarIds = array_keys($wp_registered_sidebars);

$sideBarNames = array();
foreach($wp_registered_sidebars as $row)
{
  $sideBarNames[] = $row['name'];
}