Polyfill. Gets the name of the class the static method is called in.

get_called_class.php

if (!function_exists('get_called_class')) {

	/**
	 * Gets the name of the class the static method is called in.
	 *
	 * @return string
	 */
	function get_called_class() {
		$arr = array();
		$arrTraces = debug_backtrace();

		foreach ($arrTraces as $arrTrace) {
			if (!array_key_exists('class', $arrTrace)) {
				continue;
			}

			if (count($arr) == 0) {
				$arr[] = $arrTrace['class'];
			} else if (get_parent_class($arrTrace['class']) == end($arr)) {
				$arr[] = $arrTrace['class'];
			}
		}

		return end($arr);
	}

}