Array: How to put value in array index? - php

Question

I have text boxes with a default value. I want to put them in array output as shown below.
P.S: I need the expected array output (shown below) for my dynamic options in my online quiz program when creating questions
if(isset($_POST['btn_submit'])
{
//code here
}
<form method="post">
//question 1 array index [0]
<input type="text" name="option" value="1">
<input type="text" name="option" value="2">
<input type="text" name="option" value="3">
//question 2 array index [1]
<input type="text" name="option" value="1">
<input type="text" name="option" value="2">
<input type="submit" name="btn_submit">
</form>
EXPECTED ARRAY OUTPUT VALUES:
array (
[0] => 1,2,3
[1] => 1,2
)
EDIT:
It's possible to have the same name but still gets the expected array value? then, put them in one variable array

Answer 1

You need to use array in name attribute as:
<form method="post">
<input type="text" name="option_1[]" value="1">
<input type="text" name="option_1[]" value="2">
<input type="text" name="option_1[]" value="3">
<input type="text" name="option_2[]" value="1">
<input type="text" name="option_2[]" value="2">
</form>
PHP:
if(isset($_POST['btn_submit']))
{
$newArr[] = implode(',',$_POST['option_1']);
$newArr[] = implode(',',$_POST['option_2']);
echo "<pre>";
print_r($newArr);
}
Result:
Array
(
[0] => 1,2,3
[1] => 1,2
)
If you just want to use one single name option than use this:
<form method="post">
<input type="text" name="option[0][]" value="1">
<input type="text" name="option[0][]" value="2">
<input type="text" name="option[0][]" value="3">
<input type="text" name="option[1][]" value="1">
<input type="text" name="option[1][]" value="2">
<input type="submit" name="btn_submit">
</form>
PHP:
if(isset($_POST['btn_submit']))
{
$newArr[] = implode(',',$_POST['option'][0]);
$newArr[] = implode(',',$_POST['option'][1]);
echo "<pre>";
print_r($newArr);
}

Answer 2

Replace your code with following code and IT WILL WORK.
if(isset($_POST['btn_submit'])
{
//code here
}
<form method="post">
//question 1 array index [0]
<input type="text" name="option[0][]" value="1">
<input type="text" name="option[0][]" value="2">
<input type="text" name="option[0][]" value="3">
//question 2 array index [1]
<input type="text" name="option[1][]" value="1">
<input type="text" name="option[1][]" value="2">
<input type="submit" name="btn_submit">
</form>

Answer 3

You can simply use [] before the option name to make it as an array.
//question 1 array index [0]
<input type="text" name="option_1[]" value="1">
<input type="text" name="option_1[]" value="2">
<input type="text" name="option_1[]" value="3">
//question 2 array index [1]
<input type="text" name="option_2[]" value="1">
<input type="text" name="option_2[]" value="2">