elgg_extract($key, array $array, $default=null, $strict=true)
Checks for $array[$key] and returns its value if it exists, else returns $default.
elgg echo
Translates a string.
elgg_deprecated_notice($msg, $dep_version, $backtrace_level=1)
Log a notice about deprecated use of a function, view, etc.
elgg_view($view, $vars=array(), $bypass=false, $ignored=false, $viewtype= '')
Return a parsed view.