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https://github.com/PHPOffice/PhpSpreadsheet.git
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oleibman
ecbd702628
Phpstan hasn't identified any errors in Samples in a long time. But, as it turns out, one particular error is suppressed: ``` Variable $helper might not be defined. ``` This error would be generated by almost all samples, and the errors that it suppresses will become problematic if we move to Level 10. We are not yet committed to doing that, but it is pretty easy to write a script to change the samples so that error no longer happens, and there isn't really any reason to delay doing so. The results of that script constitute this PR.
78 lines
2.8 KiB
PHP
78 lines
2.8 KiB
PHP
<?php
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use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
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use PhpOffice\PhpSpreadsheet\Helper\Sample;
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use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
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require __DIR__ . '/../Header.php';
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/** @var Sample $helper */
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$helper = new Sample();
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if ($helper->isCli()) {
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$helper->log('This example should only be run from a Web Browser' . PHP_EOL);
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return;
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}
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$postA = htmlentities(StringHelper::convertToString($_POST['A'] ?? ''));
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$postB = htmlentities(StringHelper::convertToString($_POST['B'] ?? ''));
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$postC = htmlentities(StringHelper::convertToString($_POST['C'] ?? ''));
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?>
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<form action="45_Quadratic_equation_solver.php" method="POST">
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Enter the coefficients for Ax<sup>2</sup> + Bx + C = 0
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<table border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td>
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<b>A </b>
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</td>
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<td>
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<input name="A" type="text" size="8" value="<?php echo $postA; ?>">
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</td>
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</tr>
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<tr>
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<td>
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<b>B </b>
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</td>
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<td>
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<input name="B" type="text" size="8" value="<?php echo $postB; ?>">
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</td>
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</tr>
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<tr>
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<td><b>C </b>
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</td>
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<td>
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<input name="C" type="text" size="8" value="<?php echo $postC; ?>">
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</td>
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</tr>
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</table>
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<input name="submit" type="submit" value="calculate"><br />
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If A=0, the equation is not quadratic.
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</form>
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<?php
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/** If the user has submitted the form, then we need to execute a calculation * */
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if (isset($_POST['submit'])) {
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if (!is_numeric($postA) || !is_numeric($postB) || !is_numeric($postC)) { // validate input
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$helper->log('Non-numeric input');
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} elseif ($postA == 0) {
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$helper->log('The equation is not quadratic');
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} else {
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// Calculate and Display the results
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$helper->log('<hr /><b>Roots:</b><br />');
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$discriminantFormula = '=POWER(' . $postB . ',2) - (4 * ' . $postA . ' * ' . $postC . ')';
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$discriminant = Calculation::getInstance()->calculateFormula($discriminantFormula);
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$discriminant = StringHelper::convertToString($discriminant);
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$r1Formula = '=IMDIV(IMSUM(-' . $postB . ',IMSQRT(' . $discriminant . ')),2 * ' . $postA . ')';
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$r2Formula = '=IF(' . $discriminant . '=0,"Only one root",IMDIV(IMSUB(-' . $postB . ',IMSQRT(' . $discriminant . ')),2 * ' . $postA . '))';
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/** @var string */
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$output = Calculation::getInstance()->calculateFormula($r1Formula);
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$helper->log("$output");
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/** @var string */
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$output = Calculation::getInstance()->calculateFormula($r2Formula);
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$helper->log("$output");
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$callEndTime = microtime(true);
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$helper->logEndingNotes();
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}
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}
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