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POHow to display incorrect answers using html/php/mysqli
 

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  1. POHow to display incorrect answers using html/php/mysqli
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    <p>I have a query below where it displays the correct answer per question in an exam: </p> <pre><code>&lt;? $query = "SELECT q.SessionId, q.QuestionId an.Answer FROM Session s INNER JOIN Question q ON s.SessionId = q.SessionId JOIN Answer an ON q.QuestionId = an.QuestionId AND an.SessionId = q.SessionId WHERE s.SessionName = "XULWQ" ORDER BY q.QuestionId, an.Answer "; // prepare query $stmt=$mysqli-&gt;prepare($query); // You only need to call bind_param once $stmt-&gt;bind_param("s", $assessment); // execute query $stmt-&gt;execute(); // This will hold the search results $searchQuestionId = array(); $searchAnswer = array(); // Fetch the results into an array // get result and assign variables (prefix with db) $stmt-&gt;bind_result($dbSessionId, $dbQuestionId, $dbAnswer); while ($stmt-&gt;fetch()) { $searchQuestionId[] = $dbQuestionId; $searchAnswer[] = $dbAnswer; } ?&gt; </code></pre> <p>Below is the result is outputs from the query:</p> <pre><code>SessionId QuestionId Answer 137 1 B 137 1 D 137 1 F 137 2 A 137 2 C </code></pre> <p>Now I have stored the data above in a php/html table using code below:</p> <pre><code>&lt;table border='1' id='markstbl'&gt; &lt;thead&gt; &lt;tr&gt; &lt;th class='questionth'&gt;Question No.&lt;/th&gt; &lt;th class='answerth'&gt;Answer&lt;/th&gt; &lt;/tr&gt; &lt;/thead&gt; &lt;tbody&gt; &lt;?php $row_span = array_count_values($searchQuestionId); $prev_ques = ''; foreach($searchQuestionId as $key=&gt;$questionId){ ?&gt; &lt;tr class="questiontd"&gt; &lt;?php if($questionId != $prev_ques){ ?&gt; &lt;td class="questionnumtd q&lt;?php echo$questionId?&gt;_qnum" name="numQuestion" rowspan="&lt;?php echo$row_span[$questionId]?&gt;"&gt; &lt;?php echo$questionId?&gt; &lt;/td&gt; &lt;?php } ?&gt; &lt;td class="answertd" name="answers[]"&gt;&lt;?php echo$searchAnswer[$key]?&gt;&lt;input type='hidden' id='hidanswerid' name='answersId[]' value='&lt;?php echo$searchAnswerId[$key]?&gt;'&gt;&lt;/td&gt; &lt;/tr&gt; &lt;?php $prev_ques = $questionId; } ?&gt; &lt;/tbody&gt; &lt;/table&gt; </code></pre> <p>The output of the html/php table:</p> <p><img src="https://i.stack.imgur.com/hOhAS.png" alt="enter image description here"></p> <p>So you can see I outputted a table where it contains the correct answers per question in that exam. Great. But now I want to create another page which is similar but this time except displaying the correct answers per question, I want it to display the incorrect answers per question.</p> <p>I am not sure what is best way to do it but my plan I believe is to first retrieve the option_type for each question (option type is the number of options to select an answer from):</p> <p>Query:</p> <pre><code> $query="SELECT q.SessionId, q.QuestionId, o.OptionId FROM SESSION s INNER JOIN Question q ON s.SessionId = q.SessionId JOIN Option_Table o ON q.OptionId = o.OptionId WHERE s.SessionName = "XULWQ" ORDER BY q.QuestionId"; </code></pre> <p>Result:</p> <pre><code>SessionId QuestionId OptionId 137 1 5 137 2 2 </code></pre> <p>Then use a case statement in php to display the letters for each case (need help coding this):</p> <p>E.g </p> <pre><code>case 1, OptionId = 1, letters = A B C case 2, OptionId = 2, letters = A B C D case 3, OptionId = 3, letters = A B C D E ... //continue going down case 26, OptionId = 26, letters = A B C D E ... Z case 27, OptionId = 27, letters = True False (Options True or False) case 28, OptionId = 28, letters = Yes or No (Options Yes or No) </code></pre> <p>Then some how remove the correct answers from the letters (maybe using query but I am not sure) so the html/php table contains all the incorrect answers rather than the correct answers in the table</p> <p>So my question is how can it be coded in order to display the incorrect answers rather than the correct answer in the html/php table?</p> <p>The output of the html/php table from the example above should look like this:</p> <p><img src="https://i.stack.imgur.com/B5KcX.png" alt="enter image description here"></p> <p>Comment: You can exchange the answers among questions while printing. </p>
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    1. USSarang
    1. USuser1941871
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    1. COuse array_diff to get the incorrect answers. $leters=A,B,C,D; $correct_ans=B,D; $incorrect_ans=array_diff($letters,$correct_ans);
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      1. POHow to display incorrect answers using html/php/mysqli
      1. USKirtan
    2. CO@Kirtan if you can provide me an answer showing where and what the code page should look like, I will be very happy and mark your answer
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      1. USuser1941871
 

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