if is within sidebar [duplicate]

EDIT:

Here I have registered 2 sidebars in functions.php with names sidebar1 and sidebar2.

$sidebar_args = array(
    'name'          => __( 'sidebar1', 'theme_text_domain' ),
    'id'            => 'sidebar-1',
    'description'   => '',
        'class'         => '',
    'before_widget' => '<li id="%1$s" class="widget %2$s">',
    'after_widget'  => '</li>',
    'before_title'  => '<h2 class="widgettitle">',
    'after_title'   => '</h2>' );

register_sidebar( $sidebar_args );


$sidebar_args_2 = array(
    'name'          => __( 'sidebar2', 'theme_text_domain' ),
    'id'            => 'sidebar-2',
    'description'   => '',
        'class'         => '',
    'before_widget' => '<li id="%1$s" class="widget %2$s">',
    'after_widget'  => '</li>',
    'before_title'  => '<h2 class="widgettitle">',
    'after_title'   => '</h2>' );

register_sidebar( $sidebar_args_2 );

And now retrieving their names on theme’s page like this.

<?php
    global $wp_registered_sidebars;
    $my_sidebars = $wp_registered_sidebars;

    foreach($my_sidebars as $my_sidebar){
        echo $my_sidebar['name'];
    }

 ?>

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