Faster Ways of using Arrays

[Napster]

I have this script where all the admin information is stored in arrays like so:

  $admins = array(admin1 => "Josh", 

              admin2 => "Eric",

              admin3 => "Akara",

              admin4 => "Elinfoen",

	  admin5 => "Allanon",

	  admin6 => "Ally",

	  admin7 => "Dark Paladin",

	  admin8 => "Durin");


  $admininfo['admin1'] = array(job => "Head Programmer", age => "17", email => "<a href=\"/admin.php?action=email\">Email</a>", emailme => "[e-mail]");

  $admininfo['admin2'] = array(job => "Head Programmer", age => "17", email => "<a href=\"/admin.php?action=email\">Email</a>", emailme => "[e-mail]");

  $admininfo['admin3'] = array(job => "Images/Layout Maker", age => "12", email => "<a href=\"/admin.php?action=email\">Email</a>", emailme => "[e-mail]");

  $admininfo['admin4'] = array(job => "Images", age => "18", email => "<a href=\"/admin.php?action=email\">Email</a>", emailme => "[e-mail]");


  $admininfo['admin5'] = array(job => "Moderator", age => "13", email => "<a href=\"/admin.php?action=email\">Email</a>", emailme => "[e-mail]");

  $admininfo['admin6'] = array(job => "Moderator", age => "N/A", email => "N/A");

  $admininfo['admin7'] = array(job => "Moderator", age => "N/A", email => "N/A");

  $admininfo['admin8'] = array(job => "Moderator", age => "N/A", email => "N/A");

Now on another part of the script there is a form and it posts an admin name from the form from a select menu. What would be the fastest way of getting the email of that admin? I currently have the following but I know there is a faster way.

  foreach ($admins as $j => $k) {

if ($k == $_POST['admin']) $adminemail = $admininfo[$j]['emailme'];

}

[planetsim]

Not the best but more accurate, it probably isnt the quickiest either.

if (array_key_exists($_POST['admin'], $admininfo))
{
    $adminemail = $admininfo[$_POST['admin']]['emailme'];
}

Or

if (isset($admininfo[$_POST['admin']]))
{
    $adminemail = $admininfo[$_POST['admin']]['emailme'];
}

[Weedpacket]

Well, a faster way would be to use an associative array:

$admininfo = array(
"Josh" => array('job' => "Head Programmer", 'age' => "17", 'email' => "<a href=\"/admin.php?action=email\">Email</a>", 'emailme' => "[e-mail]"),

"Eric" => array("job" => "Head Programmer", "age" => "17", "email" => "<a href=\"/admin.php?action=email\">Email</a>", "emailme" => "[e-mail]")

...
);

And associate the admin's attributes with the admin's name. Then Josh's email address would be
$admininfo['Josh']['emailme'].