Activities related to services display properly - php

Question

I want to store related activities of services
<form method='post' id='userform' action='arrayvalue.php'>
<tr>
<td>Trouble Type</td>
<br>
<td>
<input type='checkbox' name='servicevar[]' value='tds'>tds<br> <br>
<input type='checkbox' name='activityvar[]' value='One'>Return<br>
<input type='checkbox' name='activityvar[]' value='Two'>Filling<br>
<br>
<input type='checkbox' name='servicevar[]' value='Gst'>Gst<br> <br>
<td>
<input type='checkbox' name='activityvar[]' value='One'>Return<br>
<input type='checkbox' name='activityvar[]' value='Two'>Filling<br>
<br>
</td>
</tr>
</table> <input type='submit' name="submit" class='buttons'>
</form>
<?php if(isset($_POST[submit]) {
$activity = $_POST['activityvar'];
$service = $_POST['servicevar'];
foreach ($service as $key => $value) {
echo ($value);
echo "<br>";
foreach ($activity as $key => $value) {
echo ($value);
echo "<br>";
}
}
}
MY OUTPUT:
tds
one
two
one
two
Gst
one
two
one
two
Expected Output:
tds
one
two
Gst
one
two

Answer 1

Try to use One foreach loop with index's like :
if(isset($_POST[submit]) {
$activity = $_POST['activityvar'];
$service = $_POST['servicevar'];
$index = 0;
foreach ($service as $key => $value) {
echo $value;
echo $activity[$index]; $index++;
echo $activity[$index]; $index++;
}
}
EDIT : To store the data in your database, use the same concept like :
if(isset($_POST[submit]) {
$activity = $_POST['activityvar'];
$service = $_POST['servicevar'];
$index = 0;
$nbr_of_related_activities = 2;
foreach ($service as $key => $value) {
$servicevalue = $value;
for ($i=0; $i<$nbr_of_related_activities;$i++) {
$activityvalue = $activity[$index+$i];
$query = "insert into serviceacitivitymap(service_id,activity_id) values('$servicevalue','$activityvalue')";
$insert_row = $conn->query($query) or die ($conn->error.__LINE__);
}
$index += $nbr_of_related_activities;
}
}