insert multiple arrays to database - php

Question

I am creating a multiple choice quiz and I don't know how to insert multiple arrays to database. I can insert the first 2 arrays using array_combine but cannot on the 3rd, 4th, 5th, and 6th array. I can insert questions and answers but not the options A, B, C, and D.
I'm trying to do something like
foreach(array_combine($_POST['inQuestion'], $_POST['inAnswer'], $_POST['inA'], $_POST['inB'], $_POST['inC'], $_POST['inD']) as $question => $answer => $A => $B => $C => $D) {
Please help. Here is my code.
<?php
if(isset($_POST['btnCreate'])) {
$inQuestion = array($_POST['inQuestion']);
$inAnswer = array($_POST['inAnswer']);
$inA = array($_POST['inA']);
$inB = array($_POST['inB']);
$inC = array($_POST['inC']);
$inD = array($_POST['inD']);
$inLesson = $_POST['inLesson'];
$inQuizNo = $_POST['inQuizNo'];
$sql = "SELECT * FROM lessons WHERE title='$inLesson'";
$query = mysql_query ($sql);
$row = mysql_fetch_assoc($query);
$lessonID = $row['lessonID'];
foreach(array_combine($_POST['inQuestion'], $_POST['inAnswer']) as $question => $answer) {
$sql = "INSERT INTO `test` (question, answer, A, B, C, D, lessonID, quizNo) VALUES ('$question', '$answer', '$A', '$B', '$C', '$D', '$lessonID', $inQuizNo)";
$query = mysql_query( $sql );
}
}
?>
<div class="panel panel-info">
<div class="panel-heading">
<h4>Create Assessment - Multiple Choice</h4>
</div>
<div class="panel-body">
<form method="post">
<br>
<div>
<div class="col-md-4">
<strong>Lesson</strong><br>
<select class="form-control" name="inLesson">
<option></option>
<option disabled></option>
<?php
$sql2 = "SELECT * FROM lessons WHERE courseID='$_GET[courseID]'";
$query2 = mysql_query ($sql2);
while ($row2 = mysql_fetch_assoc($query2)) {
?>
<option><?php echo $row2['title']; ?></option>
<?php } ?>
</select>
</div>
<div class="col-md-4">
<strong>Quiz No.</strong><br>
<input required type="number" class="form-control" name="inQuizNo" min="1" max="100">
</div>
<div class="col-md-4">
<div class="pull-right">
<br>
<input type="button" value="Add" id="addButton" class="btn btn-info">
<input type="button" value="Remove" id="removeButton" class="btn btn-warning">
</div>
</div>
</div>
<br><br><br><br><br>
<div id='TextBoxesGroup'>
<div id="TextBoxDiv1" class="form-group">
<h2><span class="label label-primary">No. 1</span></h2>
<br><br>
<div class="col-md-10">
<label>Question</label><input type='text' id='textbox1' name='inQuestion[]' class="form-control">
</div>
<div class="col-md-2">
<label>Answer</label><input type='text' id='textbox1' name='inAnswer[]' class="form-control">
<br>
</div>
<div class="col-md-3">
<label>A</label><input type='text' id='textbox1' name='inA[]' class="form-control">
</div>
<div class="col-md-3">
<label>B</label><input type='text' id='textbox1' name='inB[]' class="form-control">
</div>
<div class="col-md-3">
<label>C</label><input type='text' id='textbox1' name='inC[]' class="form-control">
</div>
<div class="col-md-3">
<label>D</label><input type='text' id='textbox1' name='inD[]' class="form-control">
<br><br>
</div>
</div>
</div>
<div class="col-md-12">
<button type="submit" name="btnCreate" class="btn btn-success pull-right">Create Quiz
</div>
</form>
</div>

Answer 1

From what I understood, you are trying to insert multible rows INTO your database.
First, when you use the [] in HTML forms you don't have to declare it as an array in php
Second, each question will have a question name, answer, A,B,C,D
When you trying to create the HTML form you could use this format to keep track the question_id or number.
<label>Question</label><input type='text' id='textbox1' name='inQuestion[1]' class="form-control">
Then you will be able to retrieve this item as $_POST['inQuestion'][1]
For Example, if you need 10 questions in your test page you can do it like this:
<?php for($i = 0; $i <= 10; $i++) : ?>
<form method="post">
<div class="col-md-10">
<label>Question</label><input type='text' id='textbox1' name='inQuestion[<?=$i;?>]' class="form-control">
</div>
<div class="col-md-2">
<label>Answer</label><input type='text' id='textbox1' name='inAnswer[<?=$i;?>]' class="form-control">
<br>
</div>
<div class="col-md-3">
<label>A</label><input type='text' id='textbox1' name='inA[<?=$i;?>]' class="form-control">
</div>
<div class="col-md-3">
<label>B</label><input type='text' id='textbox1' name='inB[<?=$i;?>]' class="form-control">
</div>
<div class="col-md-3">
<label>C</label><input type='text' id='textbox1' name='inC[<?=$i;?>]' class="form-control">
</div>
<div class="col-md-3">
<label>D</label><input type='text' id='textbox1' name='inD[<?=$i;?>]' class="form-control">
<br><br>
</div>
<input type="submit" value="go">
</form>
<?php endfor; ?>
Also, why do you put the content of the Answers A,B,C,D to an array while you have them is columns in your database. Also use these variables in your query too.
$inA = $_POST['inA'];
$inB = $_POST['inB'];
$inC = $_POST['inC'];
$inD = $_POST['inD'];
Finally Let's try to insert your values now.
if($_POST['btnCreate']){
// The form has been posted!
$inLesson = $_POST['inLesson'];
$inQuizNo = $_POST['inQuizNo'];
$questionsCount = count($_POST['inQuestion']);
$items = array();
// Since we should have the same size of arrays.
// Also the empty validation has been handled before this step!
for($i = 0; $i < $questionsCount; $i++){
$temp = array();
$temp['inQuestion'] = $_POST['inQuestion'][$i];
$temp['inAnswer'] = $_POST['inAnswer'][$i];
$temp['inA'] = $_POST['inA'][$i];
$temp['inB'] = $_POST['inB'][$i];
$temp['inC'] = $_POST['inC'][$i];
$temp['inD'] = $_POST['inD'][$i];
$items[] = $temp;
}
// Now items should have an array of all questions.
foreach($items as $item){
$SQL = 'INSERT INTO `test` (question, answer, A, B, C, D, lessonID, quizNo) VALUES (
"'.$item['inQuestion'].'",
"'.$item['inAnswer'].'",
"'.$item['inA'].'",
"'.$item['inB'].'",
"'.$item['inC'].'",
"'.$item['inD'].'",
"'.$inLesson.'",
"'.$inQuizNo.'")';
$query = mysql_query( $SQL );
} // End Foreach
}

Answer 2

Try This
<?php
if(isset($_POST['btnCreate'])) {
$inQuestion = array($_POST['inQuestion']);
$inAnswer = array($_POST['inAnswer']);
$inA = $_POST['inA'] ? $_POST['inA'] : null;
$inB = $_POST['inB'] ? $_POST['inB'] : null;
$inC = $_POST['inC'] ? $_POST['inC'] : null;
$inD = $_POST['inD'] ? $_POST['inD'] : null;
$inLesson = $_POST['inLesson'];
$inQuizNo = $_POST['inQuizNo'];
$sql = "SELECT * FROM lessons WHERE title='$inLesson'";
$query = mysql_query ($sql);
$row = mysql_fetch_assoc($query);
$lessonID = $row['lessonID'];
$sql = "INSERT INTO `test` (question, answer, A, B, C, D, lessonID, quizNo) VALUES ('$question', '$answer', '$inA', '$inB', '$inC', '$inD', '$lessonID', $inQuizNo)";
$query = mysql_query( $sql );
}
?>
<div class="panel panel-info">
<div class="panel-heading">
<h4>Create Assessment - Multiple Choice</h4>
</div>
<div class="panel-body">
<form method="post">
<br>
<div>
<div class="col-md-4">
<strong>Lesson</strong><br>
<select class="form-control" name="inLesson">
<option></option>
<option disabled></option>
<?php
$sql2 = "SELECT * FROM lessons WHERE courseID='$_GET[courseID]'";
$query2 = mysql_query ($sql2);
while ($row2 = mysql_fetch_assoc($query2)) {
?>
<option><?php echo $row2['title']; ?></option>
<?php } ?>
</select>
</div>
<div class="col-md-4">
<strong>Quiz No.</strong><br>
<input required type="number" class="form-control" name="inQuizNo" min="1" max="100">
</div>
<div class="col-md-4">
<div class="pull-right">
<br>
<input type="button" value="Add" id="addButton" class="btn btn-info">
<input type="button" value="Remove" id="removeButton" class="btn btn-warning">
</div>
</div>
</div>
<br><br><br><br><br>
<div id='TextBoxesGroup'>
<div id="TextBoxDiv1" class="form-group">
<h2><span class="label label-primary">No. 1</span></h2>
<br><br>
<div class="col-md-10">
<label>Question</label><input type='text' id='textbox1' name='inQuestion[]' class="form-control">
</div>
<div class="col-md-2">
<label>Answer</label><input type='text' id='textbox1' name='inAnswer[]' class="form-control">
<br>
</div>
<div class="col-md-3">
<label>A</label><input type='text' id='textbox1' name='inA' class="form-control">
</div>
<div class="col-md-3">
<label>B</label><input type='text' id='textbox1' name='inB' class="form-control">
</div>
<div class="col-md-3">
<label>C</label><input type='text' id='textbox1' name='inC' class="form-control">
</div>
<div class="col-md-3">
<label>D</label><input type='text' id='textbox1' name='inD' class="form-control">
<br><br>
</div>
</div>
</div>
<div class="col-md-12">
<button type="submit" name="btnCreate" class="btn btn-success pull-right">Create Quiz
</div>
</form>
</div>

Answer 3

rather than posting a detailed solution, play with how to insert multiple rows to get some ideas
Something like:
$_POST['inQuestion'] = array(
'q1','q2','q3' // from input array name 'inQuestion[]'
);
$_POST['inAnswer'] = array(
'a1','a2','a3' // from input array name 'inAnswer[]'
);
$_POST['other'] = 'sunshine';
$_POST['yet_another'] = 'nice weather';
foreach($_POST['inQuestion'] as $k => $v){
$inserts[] = "(".$v.",".$_POST['inAnswer'][$k].",".$_POST['other'].",".$_POST['yet_another'].")";
}
echo "INSERT INTO table col_1, col_2, col_3, col_4 VALUES ".implode(',',$inserts)."";
// INSERT INTO table col_1, col_2, col_3, col_4 VALUES (q1,a1,sunshine,nice weather),(q2,a2,sunshine,nice weather),(q3,a3,sunshine,nice weather)