wp_kses_bad_protocol( string $content, string[] $allowed_protocols ): string

1984function wp_kses_bad_protocol( $content, $allowed_protocols ) {1985	$content = wp_kses_no_null( $content );1986 1987	// Short-circuit if the string starts with `https://` or `http://`. Most common cases.1988	if (1989		( str_starts_with( $content, 'https://' ) && in_array( 'https', $allowed_protocols, true ) ) ||1990		( str_starts_with( $content, 'http://' ) && in_array( 'http', $allowed_protocols, true ) )1991	) {1992		return $content;1993	}1994 1995	$iterations = 0;1996 1997	do {1998		$original_content = $content;1999		$content          = wp_kses_bad_protocol_once( $content, $allowed_protocols );2000	} while ( $original_content !== $content && ++$iterations < 6 );2001 2002	if ( $original_content !== $content ) {2003		return '';2004	}2005 2006	return $content;2007}