'<math><mrow><msqrt><mrow><mn>2</mn><msqrt><mn>3</mn></msqrt></mrow></msqrt><mi>#a</mi></mrow></math>',
'<math><mrow><msub><mi>#</mi><mi>a</mi></msub></mrow></math>' => '<math><mrow><msub><mi>#</mi><mi>a</mi></msub></mrow></math>',
'<math><mrow><mi>#</mi><msub><mi>a</mi><mi>c</mi></msub></mrow></math>'=>'<math><mrow><msub><mi>#a</mi><mi>c</mi></msub></mrow></math>',
);
foreach($tests as $test=>$correct){
$resp = wrsqz_prepareVariablesInsideFormulas($test, FALSE);
echo '<tr><td>';
echo $resp == $correct ? 'OK' : 'KO';
echo '</td>';
echo '<td>'.htmlentities($test, ENT_COMPAT, 'UTF-8').'</td>';
echo '<td>'.htmlentities($resp, ENT_COMPAT, 'UTF-8').'</td>';
echo '</tr>';
}
foreach($tests as $test=>$correct){
$correct = wrsqz_mathmlEncode($correct);
$test = wrsqz_mathmlEncode($test);
$resp = wrsqz_prepareVariablesInsideFormulas($test, TRUE);
echo '<tr><td>';
echo $resp == $correct ? 'OK' : 'KO';
echo '</td>';
echo '<td>'.htmlentities($test, ENT_COMPAT, 'UTF-8').'</td>';
echo '<td>'.htmlentities($resp, ENT_COMPAT, 'UTF-8').'</td>';
echo '</tr>';
}
?>
</tr>
</table>
</body>
</html>
/**
* To be called before save_question_options.
* It changes formulas in questiontext fixing MathML issues related to variable assembling.
* **/
function wrsqz_presave_question($questionType, $dbType, &$question, &$form, $course){
$form->questiontext = wrsqz_prepareVariablesInsideFormulas($form->questiontext);
}
