wp_get_referer() │ WP 2.0.4

Retrieve referer from '_wp_http_referer' or HTTP referer.

If it's the same as the current request URL, will return false.

Uses: wp_get_raw_referer(), wp_validate_redirect()
1 time — 0.001678 sec (very slow) | 50000 times — 2.26 sec (fast) | PHP 7.0.32, WP 5.1.1

No Hooks.

Return

String|false. Referer URL on success, false on failure.

Usage

wp_get_referer();

Changelog

Since 2.0.4 Introduced.

Code of wp_get_referer() WP 5.9.3

wp-includes/functions.php 
function wp_get_referer() {
	if ( ! function_exists( 'wp_validate_redirect' ) ) {
		return false;
	}

	$ref = wp_get_raw_referer();

	if ( $ref && wp_unslash( $_SERVER['REQUEST_URI'] ) !== $ref && home_url() . wp_unslash( $_SERVER['REQUEST_URI'] ) !== $ref ) {
		return wp_validate_redirect( $ref, false );
	}

	return false;
}

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