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I am trying to add theme support for custom background using the following code in functions.php file:

function supp_custom_bg() {
    $defaults = array(
        'default-color'          => '',
        'default-image'          => '',
        'wp-head-callback'       => '_custom_background_cb',
        'admin-head-callback'    => '',
        'admin-preview-callback' => ''
    );
    add_theme_support( 'custom-background', $defaults );
}
add_action( 'after_setup_theme', 'supp_custom_bg', 20 );

and the options now are activated in the customizer but no effect on the theme.

Note: The wp_head is added to the <head> tag

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2 Answers 2

Reset to default
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The simplest way to use this feature:

  1. Add add_theme_support( 'custom-background' ); to functions.php
  2. Use body_class() in your body tag like this: <body <?php body_class(); ?>>
  3. use <?php wp_head(); ?> in your head tag

if you go to the customizer should look like this:

enter image description here

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  • Thank you very much i was missing the <?php body_class(); ?>
    – Makiomar
    Commented Mar 18, 2017 at 17:27
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If you intend to customize how background image is implemented in your theme then do share the code of your _custom_background_cb callback function. If not and simply wanted to add background image then remove wp-head-callback.

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6
  • Actually I tried only the default-color argument but also no response
    – Makiomar
    Commented Mar 18, 2017 at 13:10
  • Is your _custom_background_cb code print the color or background image in CSS in your head?
    – Irene Mitchell
    Commented Mar 18, 2017 at 13:23
  • Nothing is printed.. actually I didn't define this function but after the first try using the default-color I copied these lines from codex to check but nothing also changed
    – Makiomar
    Commented Mar 18, 2017 at 13:52
  • Could you please answer with right way to use this feature with full code and I will try to figuer out what was wrong with me
    – Makiomar
    Commented Mar 18, 2017 at 13:54
  • I see. if that is the case then you only need add_theme_support( 'custom-background' ); and it should work -:
    – Irene Mitchell
    Commented Mar 18, 2017 at 13:56

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