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  Classes of Alex Dan  >  Expressions  >  main.php  >  Download  
File: main.php
Role: Example script
Content type: text/plain
Description: Expression Example script
Class: Expressions
Parse, convert and evaluate math expressions
Author: By
Last change:
Date: 2012-07-08 02:55
Size: 561 bytes
 

Contents

Class file image Download
<?php
error_reporting (E_ALL);
include 'Config/load.php';

$evaluator = Expression_Evaluator::getInstance();

$str = '(10 + 20) + (1 + 3 * 2 / (1+1))';
$strPostfix = $evaluator->getConvertor()->strInfixToStrPostfix($str);
echo ("\n".$str."\n");
echo ("\n".$strPostfix."\n");
echo($evaluator->evaluateStrPostfix($strPostfix));
echo(' === ');
eval('$x = '.$str.';');
echo ($x."");
$expressionTree = $evaluator->getConvertor()->strInfixToExpressionTree($str);
echo(' === ');
echo ($evaluator->evaluateExpressionTree($expressionTree));
echo ("\n");