code: public static double smogIndex(String strText) {
          strText = cleanText(strText);
          return PHPMethods.round(1.043 * Math.sqrt((wordsWithThreeSyllables(strText) * (30.0 / sentenceCount(strText))) + 3.1291), 1);
      }
docs: Returns the SMOG Index of text entered rounded to one digit.
  
  @param   strText         Text to be checked
  @return