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Quadratic2.php
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<html> <head> <title>Quadratic Equation Solver</title> </head> <body> <?php /** Error reporting **/ error_reporting(E_ALL); /** Include path **/ set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/../Classes/'); ?> <h1>Quadratic Equation Solver</h1> <form action="Quadratic2.php" method="POST"> Enter the coefficients for the Ax<sup>2</sup> + Bx + C = 0 <table border="0" cellpadding="0" cellspacing="0"> <tr><td><b>A </b></td> <td><input name="A" type="text" size="8" value="<?php echo (isset($_POST['A'])) ? htmlentities($_POST['A']) : ''; ?>"></td> </tr> <tr><td><b>B </b></td> <td><input name="B" type="text" size="8" value="<?php echo (isset($_POST['B'])) ? htmlentities($_POST['B']) : ''; ?>"></td> </tr> <tr><td><b>C </b></td> <td><input name="C" type="text" size="8" value="<?php echo (isset($_POST['C'])) ? htmlentities($_POST['C']) : ''; ?>"></td> </tr> </table> <input name="submit" type="submit" value="calculate"><br /> If A=0, the equation is not quadratic. </form> <?php /** If the user has submitted the form, then we need to execute a calculation **/ if (isset($_POST['submit'])) { if ($_POST['A'] == 0) { echo 'The equation is not quadratic'; } else { /** So we include PHPExcel to perform the calculations **/ include 'PHPExcel/Calculation.php'; /** Calculate and Display the results **/ echo '<hr /><b>Roots:</b><br />'; $callStartTime = microtime(true); $discriminantFormula = '=POWER('.$_POST['B'].',2) - (4 * '.$_POST['A'].' * '.$_POST['C'].')'; $discriminant = PHPExcel_Calculation::getInstance()->calculateFormula($discriminantFormula); $r1Formula = '=IMDIV(IMSUM(-'.$_POST['B'].',IMSQRT('.$discriminant.')),2 * '.$_POST['A'].')'; $r2Formula = '=IF('.$discriminant.'=0,"Only one root",IMDIV(IMSUB(-'.$_POST['B'].',IMSQRT('.$discriminant.')),2 * '.$_POST['A'].'))'; echo PHPExcel_Calculation::getInstance()->calculateFormula($r1Formula).'<br />'; echo PHPExcel_Calculation::getInstance()->calculateFormula($r2Formula).'<br />'; $callEndTime = microtime(true); $callTime = $callEndTime - $callStartTime; echo '<hr />Call time for Quadratic Equation Solution was '.sprintf('%.4f',$callTime).' seconds<br /><hr />'; echo ' Peak memory usage: '.(memory_get_peak_usage(true) / 1024 / 1024).' MB<br />'; } } ?> </body> <html>