WordPress at a glance

is_customize_preview() WP 1.0

Whether the site is being previewed in the Customizer.


  • Global. WP_Customize_Manager. $wp_customize Customizer instance.
✈ 1 time = 0.000014s = very fast | 50000 times = 0.01s = speed of light PHP 7.1.0, WP 4.7

No Hooks.


true/false. True if the site is being previewed in the Customizer, false otherwise.



Code of is_customize_preview: wp-includes/theme.php VER 4.9.8

function is_customize_preview() {
	global $wp_customize;

	return ( $wp_customize instanceof WP_Customize_Manager ) && $wp_customize->is_preview();

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