Register Widget Areas

functions.php

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// Register Footer Widget Areas
function mytheme_register_footer_widgets() {
    // Footer 1
    register_sidebar( array(
        'name'          => __( 'Footer 1', 'mytheme' ),
        'id'            => 'footer-1',
        'description'   => __( 'Widgets in this area will be shown in Footer 1.', 'mytheme' ),
        'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget'  => '</div>',
        'before_title'  => '<h3 class="widget-title">',
        'after_title'   => '</h3>',
    ) );

    // Footer 2
    register_sidebar( array(
        'name'          => __( 'Footer 2', 'mytheme' ),
        'id'            => 'footer-2',
        'description'   => __( 'Widgets in this area will be shown in Footer 2.', 'mytheme' ),
        'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget'  => '</div>',
        'before_title'  => '<h3 class="widget-title">',
        'after_title'   => '</h3>',
    ) );

    // Footer 3
    register_sidebar( array(
        'name'          => __( 'Footer 3', 'mytheme' ),
        'id'            => 'footer-3',
        'description'   => __( 'Widgets in this area will be shown in Footer 3.', 'mytheme' ),
        'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget'  => '</div>',
        'before_title'  => '<h3 class="widget-title">',
        'after_title'   => '</h3>',
    ) );

    // Footer 4
    register_sidebar( array(
        'name'          => __( 'Footer 4', 'mytheme' ),
        'id'            => 'footer-4',
        'description'   => __( 'Widgets in this area will be shown in Footer 4.', 'mytheme' ),
        'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget'  => '</div>',
        'before_title'  => '<h3 class="widget-title">',
        'after_title'   => '</h3>',
    ) );
}
add_action( 'widgets_init', 'mytheme_register_footer_widgets' );