mirror of
https://github.com/PHPOffice/PhpSpreadsheet.git
synced 2026-08-23 21:38:30 +00:00
oleibman
b3de003aa5
The samples have become unwieldy when running them from a browser. In particular, the drop-down lists are fixed size with no scrolling, and many of them are now just too large. I have moved all the Calculation samples up a level, and broken several categories (Basic, Chart, DateTime, Engineering, Financial, and Reader) into several pieces. Convert-Online (now found in the Engineering category) had a number of different problems which are now resolved. It is the only member with any significant code change.
72 lines
2.6 KiB
PHP
72 lines
2.6 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\Settings;
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require __DIR__ . '/../Header.php';
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$helper = new Sample();
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if ($helper->isCli()) {
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$helper->log('This example should only be run from a Web Browser' . PHP_EOL);
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return;
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}
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?>
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<form action="45_Quadratic_equation_solver.php" method="POST">
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Enter the coefficients for the Ax<sup>2</sup> + Bx + C = 0
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<table border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td>
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<b>A </b>
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</td>
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<td>
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<input name="A" type="text" size="8" value="<?php echo (isset($_POST['A'])) ? htmlentities($_POST['A'], Settings::htmlEntityFlags()) : ''; ?>">
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</td>
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</tr>
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<tr>
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<td>
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<b>B </b>
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</td>
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<td>
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<input name="B" type="text" size="8" value="<?php echo (isset($_POST['B'])) ? htmlentities($_POST['B'], Settings::htmlEntityFlags()) : ''; ?>">
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</td>
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</tr>
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<tr>
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<td><b>C </b>
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</td>
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<td>
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<input name="C" type="text" size="8" value="<?php echo (isset($_POST['C'])) ? htmlentities($_POST['C'], Settings::htmlEntityFlags()) : ''; ?>">
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</td>
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</tr>
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</table>
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<input name="submit" type="submit" value="calculate"><br />
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If A=0, the equation is not quadratic.
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</form>
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<?php
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/** If the user has submitted the form, then we need to execute a calculation * */
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if (isset($_POST['submit'])) {
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if ($_POST['A'] == 0) {
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$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(' . $_POST['B'] . ',2) - (4 * ' . $_POST['A'] . ' * ' . $_POST['C'] . ')';
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$discriminant = Calculation::getInstance()->calculateFormula($discriminantFormula);
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$r1Formula = '=IMDIV(IMSUM(-' . $_POST['B'] . ',IMSQRT(' . $discriminant . ')),2 * ' . $_POST['A'] . ')';
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$r2Formula = '=IF(' . $discriminant . '=0,"Only one root",IMDIV(IMSUB(-' . $_POST['B'] . ',IMSQRT(' . $discriminant . ')),2 * ' . $_POST['A'] . '))';
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/** @var string */
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$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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