/**
* Returns list of variables defined in the expression
*
* @param string $ps_expression
* @return array
*/
public static function getVariableList($ps_expression)
{
$o_exp = new ExpressionParser();
if ($o_exp->tokenize($ps_expression)) {
}
$va_vars = array();
while ($va_token = $o_exp->getToken()) {
if ($va_token['type'] == EEP_TOKEN_VARIABLE) {
$va_vars[] = $va_token['varname'];
}
}
return $va_vars;
}
