Determines whether the current request is inside the Customizer preview.

Description

If true — the current request is inside the Customizer preview, then the object cache gets suspended and widgets should check this to decide whether they should store anything persistently to the object cache, to transients, or anywhere else.

Return

Source

public function is_preview() {
	global $wp_customize;
	return ( isset( $wp_customize ) && $wp_customize->is_preview() );
}

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