PHP For loop for $_POST - php

Question

Sorry for the noob question. But I am stuck here.
This is my HTML form where the user-form div can be cloned to as many as possible. The #submit-form div has some hidden values which are common for all.
HTML -
<div class="user-form">
<input type="text" autocomplete="off" name="name[]" >
<input type="email" autocomplete="off" name="mail[]" >
</div>
<div class="user-form">
<input type="text" autocomplete="off" name="name[]" >
<input type="email" autocomplete="off" name="mail[]" >
</div>
<div id="submit-form">
<input type='hidden' name='refer_user_id' value='<?php echo $refer_user_id ?>'>
<input type='hidden' name='refer_user_email' value='<?php echo $refer_user_email ?>'>
<input type="submit" value="Invite" />
<input type="button" class="button" id="clonetrigger" value="Clone" />
</div>
I'm using ajax to submit the form. Basically I want to create accounts using the name and email fields. In PHP How do I use foreach to loop through the name and email fields so that I can create unique accounts?
My print_r($_POST); array looks like this.
Array
(
[name] => Array
(
[0] => david
[1] => Mark
[2] => cindy
)
[mail] => Array
(
[0] => david#abc.com
[1] => mark#abc.com
[2] => cindy#abc.com
)
[refer_user_id] => 2
[$refer_user_email] => test#abc.com
)

Answer 1

Create a loop with a number of iterations equal to the number of submitted name/email pairs, then use the loop counter to access the values for each user.
for ($i = 0; $i < count($_POST['name']); $i++) {
{
$name = $_POST['name'][$i];
$mail = $_POST['mail'][$i];
// Process the new user
}

Answer 2

go through one of the arrays with a foreach, use the key for the second array.
foreach($_POST['name'] as $key =>$name ){
$mail = $_POST[$key];
}

Answer 3

foreach($_POST['name'] as $key => $val) {
echo $val
}
foreach($_POST['mail'] as $key => $val) {
echo $val
}
Easiest way to loop through those elements. You can reference the other elements with $_POST['refer_user_id']. While this works for the purposes of a foreach, the for loop posted above is more efficient, so I'd recommend using it.
http://php.net/manual/en/control-structures.foreach.php More reading on it here.

Answer 4

You can use array_combine function:
$data = array_combine($_POST['name'],$_POST['mail']);
foreach($data as $name=>$mail){
print $name;
//...
}
See array_combine.

Answer 5

You could also use the JavaScript that's auto-generating the form items to give them a name that would result in linking the php object. i.e.
<div class="user-form">
<input type="text" autocomplete="off" name="user[1][name]" />
<input type="email" autocomplete="off" name="user[1][mail]" />
</div>
<div class="user-form">
<input type="text" autocomplete="off" name="user[2][name]" />
<input type="email" autocomplete="off" name="user[2][mail]" />
</div>
Then you could loop through the pairs with foreach($_POST['user'] as $key=>$value) etc...