Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

PHP PHP Arrays and Control Structures PHP Arrays Multidimensional Arrays

Posted by Ivan Cetter
Ivan Cetter
Courses Plus Student 826 Points

please help))

<?php //edit this array $contact1 = array ( 'Alena Holligan'=> 'alena.holligan@teamtreehouse.com' ); $contact2 = array ( 'Dave McFarland'=> 'dave.mcfarland@teamtreehouse.com' ); $contact3 = array ( 'Treasure Porth'=> 'treasure.porth@teamtreehouse.com' ); $contact4 = array ( 'Andrew Chalkley'=> 'andrew.chalkley@teamtreehouse.com' );

$list = array($contact1, $contact2, $contact3, $contact4); echo $list;

index.php 
<?php
//edit this array
$contacts = array('Alena Holligan', 'Dave McFarland', 'Treasure Porth', 'Andrew Chalkley');

echo "<ul>\n";
//$contacts[0] will return 'Alena Holligan' in our simple array of names.
echo "<li>Alena Holligan : alena.holligan@teamtreehouse.com</li>\n";
echo "<li>Dave McFarland : dave.mcfarland@teamtreehouse.com</li>\n";
echo "<li>Treasure Porth : treasure.porth@teamtreehouse.com</li>\n";
echo "<li>Andrew Chalkley : andrew.chalkley@teamtreehouse.com</li>\n";
echo "</ul>\n";
Ivan Cetter
Ivan Cetter
Courses Plus Student 826 Points

In the code below, we have a simple array of contact names. We want to use the $contacts array to fill in the hardcoded list of names and email addresses. To hold the email as well as the name for each contact, we need a multidimensional array, meaning each person in the contact list will have their own array. The first step is to make each person their own single item ASSOCIATIVE array, using 'name' as the key for these internal arrays.

3 Answers

Jonathan Francisco
Jonathan Francisco
10,106 Points 
$contacts = array(
    array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com'),
    array('name' => 'Dave McFarland', 'email' => 'dave.mcfarland@teamtreehouse.com'),
    array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com'),
    array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com')
);

// to access 'Alena Holligan' 
// $contacts[0]['name'];

Here are some links about arrays and multidimensional arrays. Arrays & Multidimensional Arrays Arrays & Multidimensional Arrays

Multidimensional arrays are simply an array inside an array :)

Ivan Cetter
PLUS
Ivan Cetter
Courses Plus Student 826 Points
Ivan Cetter
Ivan Cetter
Courses Plus Student 826 Points

Thank you so much)

Ivan Cetter
PLUS
Ivan Cetter
Courses Plus Student 826 Points
Ivan Cetter
Ivan Cetter
Courses Plus Student 826 Points

In the code below, we have a simple array of contact names. We want to use the $contacts array to fill in the hardcoded list of names and email addresses. To hold the email as well as the name for each contact, we need a multidimensional array, meaning each person in the contact list will have their own array. The first step is to make each person their own single item ASSOCIATIVE array, using 'name' as the key for these internal arrays. Bummer! I do not see the required output. You should not be modifying the output at this point.

<?php //edit this array

$contacts = array( array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com'), array('name' => 'Dave McFarland', 'email' => 'dave.mcfarland@teamtreehouse.com'), array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com'), array('name' => 'Alena Holligan', 'email' => 'alena.holligan@teamtreehouse.com') );

echo "<ul>\n";

//$contacts[0] will return 'Alena Holligan' in our simple array of names.\ echo "<li>Alena Holligan : alena.holligan@teamtreehouse.com</li>\n"; echo "<li>Dave McFarland : dave.mcfarland@teamtreehouse.com</li>\n"; echo "<li>Treasure Porth : treasure.porth@teamtreehouse.com</li>\n"; echo "<li>Andrew Chalkley : andrew.chalkley@teamtreehouse.com</li>\n"; echo "</ul>\n";