wp_populate_basic_auth_from_authorization_header()

106function wp_populate_basic_auth_from_authorization_header() {107	// If we don't have anything to pull from, return early.108	if ( ! isset( $_SERVER['HTTP_AUTHORIZATION'] ) && ! isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {109		return;110	}111 112	// If either PHP_AUTH key is already set, do nothing.113	if ( isset( $_SERVER['PHP_AUTH_USER'] ) || isset( $_SERVER['PHP_AUTH_PW'] ) ) {114		return;115	}116 117	// From our prior conditional, one of these must be set.118	$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];119 120	// Test to make sure the pattern matches expected.121	if ( ! preg_match( '%^Basic [a-z\d/+]*={0,2}$%i', $header ) ) {122		return;123	}124 125	// Removing `Basic ` the token would start six characters in.126	$token    = substr( $header, 6 );127	$userpass = base64_decode( $token );128 129	// There must be at least one colon in the string.130	if ( ! str_contains( $userpass, ':' ) ) {131		return;132	}133 134	list( $user, $pass ) = explode( ':', $userpass, 2 );135 136	// Now shove them in the proper keys where we're expecting later on.137	$_SERVER['PHP_AUTH_USER'] = $user;138	$_SERVER['PHP_AUTH_PW']   = $pass;139}