How to handle $post_[] on all inputs - php

Question

What's the ideal way to handle an input form with multiple values, without going through each $POST_['inputname'] individually?
For example, let's say I have an invite form like this:
<form id="input-form" action="" method="post" >
<input id="email_1" name="email_1" />
<input id="role_1" name="role_1" />
<input id="email_2" name="email_2" />
<input id="role_2" name="role_2" />
<input id="email_3" name="email_3" />
<input id="role_3" name="role_3" />
</form>
Ideally, I'd like to create two arrays with the data, one for the email addresses and another for the roles
The resulting arrays would look like this:
$emailArray = array(
'email1' => "emailOneData",
'email2' => "emaiTwoData",
'email3' => "emaiThreeData",
);
$RoleArray = array(
'role1' => "roleOneData",
'role2' => "roleTwoData",
'role3' => "roleThreeData",
);
Not sure what the best way of splitting the data is though. Also I don't really want to do something like this:
$_POST['email_1']
$_POST['email_2']
$_POST['email_3']
.....

Answer 1

Use instead an $_POST Array.
<form id="input-form" action="" method="post" >
<input id="email_1" name="email[]" />
<input id="role_1" name="role[]" />
<input id="email_2" name="email[]" />
<input id="role_2" name="role[]" />
<input id="email_3" name="email[]" />
<input id="role_3" name="role[]" />
</form>
After this you got an array like this:
echo'<pre>';
print_r($_POST['email']);
print_r($_POST['role']);
echo'</pre>';
Of course you still have to escape your input in dependency of your use.
After this you can use a normal foreach on the array.
$mails=array();
$count=count($_POST['role']);
for($i=0;$i<$count;$i++){
$mails["email_".$i]=$_POST['role'][$i];
}