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POHow to post and insert values into the database correctly?
 

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  1. POHow to post and insert values into the database correctly?
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    <p>I want use a multi-dimensional array in this format: value[n][], where n is the question number. With this new setup, you should end up with the following checkbox fields:</p> <pre><code>&lt;input type="checkbox" value="A" name="value[1][]"&gt; &lt;input type="checkbox" value="B" name="value[1][]"&gt; &lt;input type="checkbox" value="A" name="value[2][]"&gt; &lt;input type="checkbox" value="C" name="value[2][]"&gt; &lt;input type="checkbox" value="E" name="value[2][]"&gt; </code></pre> <p>Note that the selected value is encoded in the value attribute. The name attribute only contains the question to which the value belongs.</p> <p>So what the above inputs are stating is this:</p> <pre><code>question 1: answer: A question 1: answer: B question 2: answer: A question 2: answer: C question 2: answer: E </code></pre> <p>I want to insert these details into "Question" and "Answer" database tables below:</p> <p>Question Table:</p> <pre><code>SessionId QuestionId MUL 1 MUL 2 </code></pre> <p>Answer Table:</p> <pre><code> AnswerId (auto) SessionId QuestionId Answer 1 MUL 1 A 2 MUL 1 B 3 MUL 2 A 4 MUL 2 C 5 MUL 2 E </code></pre> <p>Now I have attempted writing the mysqli/php code below to insert these values into the database but I am receiving errors and failing badly in wanting to acheive what I want to achieve. I need help being able to correctly insert the correct values in the relevant tables.</p> <p>Below is the php/mysqli code:</p> <pre><code>var_dump($_POST); $i = 0; $c = count($_POST['numQuestion']); for($i = 0; $i &lt; $c; $i++ ){ /* switch ($_POST['gridValues'][$i]){ case "3": $selected_option = "A-C"; break; case "4": $selected_option = "A-D"; break; case "5": $selected_option = "A-E"; break; default: $selected_option = ""; break; } */ needed later on when I insert grid values $results = $_POST['value']; foreach($results as $id =&gt; $value) { $answer = $value; $questionsql = "INSERT INTO Question (SessionId, QuestionId) VALUES (?, ?)"; $sessid = $_SESSION['id'] . ($_SESSION['initial_count'] &gt; 1 ? $_SESSION['sessionCount'] : ''); if (!$insert = $mysqli-&gt;prepare($questionsql)) { // Handle errors with prepare operation here } $insert-&gt;bind_param("si", $sessid, $id); $insert-&gt;execute(); if ($insert-&gt;errno) { // Handle query error here } $insert-&gt;close(); $insert-&gt;insert_id; foreach($value as $answer) { $answersql = "INSERT INTO Answer (SessionId, QuestionId, Answer) VALUES (?, ?, ?)"; if (!$insertanswer = $mysqli-&gt;prepare($answersql)) { // Handle errors with prepare operation here } $insertanswer-&gt;bind_param("sis" $sessid, $lastID, $answer); $insertanswer-&gt;execute(); if ($insertanswer-&gt;errno) { // Handle query error here } $insertanswer-&gt;close(); } } } </code></pre> <p>The <code>var_dump($_POST)</code> outputs this below:</p> <pre><code> array(3) { ["numQuestion"]=&gt; array(2) { [0]=&gt; string(1) "1" [1]=&gt; string(1) "2" } ["submitDetails"]=&gt; string(14) "Submit Details" ["value"]=&gt; array(4) { ["answerARow"]=&gt; string(2) "on" ["answerCRow"]=&gt; string(2) "on" ["answerBRow"]=&gt; string(2) "on" ["answerERow"]=&gt; string(2) "on" } } </code></pre> <p>Below are the errors I am receiving and the line of code each error is linked to:</p> <blockquote> <p>Warning: Invalid argument supplied for foreach() in /.../ on line 252</p> </blockquote> <pre><code>foreach($value as $answer) { </code></pre> <blockquote> <p>Warning: mysqli_stmt::execute(): (23000/1062): Duplicate entry 'MUL-0' for key 'PRIMARY' in /.../ on line 242</p> </blockquote> <p>The above error shows that no question number is being inserted as it keeps displaying it as '0'</p>
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    1. COYou are doing an outer foreach that loops through `$_POST['value']` and assigns the keys to `$id` and the values to `$value`. So the `$id`s are "answerARow", "answerCRow", etc and the `$value`s are "A", "C", "B", and "E". Obviously you can't loop over a string, hence the foreach error.
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      1. POHow to post and insert values into the database correctly?
      1. USTravesty3
    2. COYour $_POST isn't matching your form? where do the `answerARow` type keys come from/
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      1. POHow to post and insert values into the database correctly?
      1. USernie
    3. CO@ernie The answerARow comes from answer buttons the user selects: I have a jsfiddle here you can look at to what my app looks like: jsfiddle.net/ybZvv/59 Please follow steps in fiddle: 1: When you open fiddle, click on "Add Question" button twice, this will append 2 rows. 2: In first row select answer buttons "A" and "C", in second row select answer buttons "A", "B" and "E". The text input values for each answer button selected is displayed underneath.
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      1. POHow to post and insert values into the database correctly?
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