_get_component_from_parsed_url_array() WP 4.7.0

Retrieve a specific component from a parsed URL array.

No Hooks.

Return

Mixed. False on parse failure; Array of URL components on success; When a specific component has been requested: null if the component doesn't exist in the given URL; a string or - in the case of PHP_URL_PORT - integer when it does. See parse_url()'s return values.

Usage

_get_component_from_parsed_url_array( $url_parts, $component );

$url_parts(array/false) (required)

The parsed URL. Can be false if the URL failed to parse.

$component(int)

The specific component to retrieve. Use one of the PHP predefined constants to specify which one.
Default: -1 (= return all parts as an array)

Code of get component from parsed url array: wp-includes/http.php ^{WP 5.2.1}

<?php
function _get_component_from_parsed_url_array( $url_parts, $component = -1 ) {
	if ( -1 === $component ) {
		return $url_parts;
	}

	$key = _wp_translate_php_url_constant_to_key( $component );
	if ( false !== $key && is_array( $url_parts ) && isset( $url_parts[ $key ] ) ) {
		return $url_parts[ $key ];
	} else {
		return null;
	}
}