Multiple values inside form php/query - php

Question

Before I start, I want to say that I used the search function but none of the other questions helped me.
I found a code that fits what I need (here) but there is a is when I try to retrieve the values.
// Edit
Assuming that i'am using exactly the some code, how to retrieve the values?
The code above is to show what happen when user click in the plus button.
<form method='post' name='form'>
<input type="text" name="username[0]'>
<input type="password" name="password[0]">
// new added fiels using the jquery
<input type="text" name="username[1]'>
<input type="password" name="password[1]">
</form>
Using a form like this, how to retrieve the values one by one?
<?php if (isset($POST['submit'])) { // what to do here? }?>
I ask this question because I want to store the values on a sql database, and I need the separated values like:
User 1 - user & pass
User 2 - user & pass
To use this on a php function that receive the $user and $pass values.

Answer 1

<form method='post' name='form'>
<input type="text" name="username['username'][]'>
<input type="password" name="password['password'][]">
// new added fiels using the jquery
<input type="text" name="['username'][]'>
<input type="password" name="password['password'][]">
<input type = "submit" name="submit" value="Submit" />
</form>
<?php
if(isset($_POST['submit'])){
$postData = $_POST;
for($i = 0; $i < count($postData);$i++){
$username = $postData['username'][$i];
$password = $postData['password'][$i];
}
}
?>

Answer 2

You can echo out each value of the array, or use it any way you want
foreach ($_POST['username'] as $user)
echo $user;

Answer 3

You could use separate arrays for every user - pass you need. For example:
<form method='post' name='form'>
<input type="text" name="user[0]['user']'>
<input type="password" name="user[0]['password']">
// new added fiels using the jquery
<input type="text" name="user[1]['user']>
<input type="password" name="user[1]['password']>
</form>
You read it from php with something like this.
<?php if (isset($_POST['user'])) {
foreach($_POST['user'] as $user){
$username = $user['user'];
$password = $user['password'];
//save into database
}
}?>
And then save into database. You could use php pdo.
http://php.net/manual/en/ref.pdo-mysql.php

Answer 4

You can use different names:
<form method='post' name='form'>
<input type="text" name="username_1">
<input type="password" name="password_1">
// new added fiels using the jquery
<input type="text" name="username_2">
<input type="password" name="password_2">
</form>
<?php
$username_1 = $_POST['username_1'];
....
Or, you can use arrays like this:
<form method='post' name='form'>
<input type="text" name="username[]">
<input type="password" name="password[]">
// new added fiels using the jquery
<input type="text" name="username[]">
<input type="password" name="password[]">
</form>
Your var $_POST['username'] and $_POST['password'] will be arrays. You can iterate the way you want:
foreach($_POST['username'] as $username)
for($i = 0, $c = count($_POST['username']); $i < $c; $i++)

Answer 5

This is pretty straightforward using PHP and HTML. You can look at some examples and documentation here: http://php.net/manual/en/reserved.variables.post.php.
You use an HTML form like this:
<form name="form1" method="post">
<input type="text" name="username1" />
<input type="password" name="password1" />
<input type="text" name="username2" />
<input type="password" name="password2" />
<input type="submit" name="submit" value="Submit" />
</form>
Then you would use PHP to get the values like this:
<?php
if (isset($_POST['submit']))
{
$user1 = $_POST['username1'];
$pass1 = $_POST['password1'];
$user2 = $_POST['username2'];
$pass2 = $_POST['password2'];
}
?>
Of course, use isset() to make sure each username and password is set also, but you get the point.