wp_installing() │ WP 4.4.0

Checks or sets whether WordPress is in "installation" mode.

If the WP_INSTALLING constant is defined during the bootstrap, wp_installing() default to true.

No Hooks.

Returns

true|false. True if WP is installing, otherwise false. When a $is_installing is passed, the function will report whether WP was in installing mode prior to the change to $is_installing.

Usage

wp_installing( $is_installing );

$is_installing(true|false)

True to set WP into Installing mode, false to turn Installing mode off. Omit this parameter if you only want to fetch the current status.
Default: null

Changelog

wp_installing() wp installing code ^{WP 7.0}

function wp_installing( $is_installing = null ) {
	static $installing = null;

	// Support for the `WP_INSTALLING` constant, defined before WP is loaded.
	if ( is_null( $installing ) ) {
		$installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
	}

	if ( ! is_null( $is_installing ) ) {
		$old_installing = $installing;
		$installing     = $is_installing;

		return (bool) $old_installing;
	}

	return (bool) $installing;
}