You can modify the standard WordPresss user registration form to require more data than the usual username + email address.
add_action('register_form','my_show_extra_fields');
add_action('register_post','my_check_fields',10,3);
add_action('user_register','my_register_extra_fields',10,3);
function my_show_extra_fields(){
?>
<style>
#user_first, #user_last, #hzip {
background:none repeat scroll 0 0 #FBFBFB;
border:1px solid #E5E5E5;
font-size:24px;
margin-bottom:16px;
margin-right:6px;
margin-top:2px;
padding:3px;
width:97%;
}
</style>
<p><label>First Name<br/>
<input id="user_first" type="text" tabindex="20" size="25" value="<?php echo $_POST['first']; ?>" name="first"/>
</label></p>
<p><label>Last Name<br/>
<input id="user_last" type="text" tabindex="20" size="25" value="<?php echo $_POST['last']; ?>" name="last"/>
</label></p>
<p><label>Home ZIP Code<br/>
<input id="hzip" type="text" tabindex="20" size="25" maxlength="10" value="<?php echo $_POST['hzip']; ?>" name="hzip"/>
</label></p>
<?php
}
function my_check_fields($login, $email, $errors) {
global $firstname, $lastname, $hzip;
if ($_POST['first'] == '') {
$errors->add('empty_realname', "<strong>ERROR</strong>: Please enter first name");
} else {
$firstname = $_POST['first'];
}
if ($_POST['last'] == '') {
$errors->add('empty_realname', "<strong>ERROR</strong>: Please enter last name");
} else {
$lastname = $_POST['last'];
}
if ($_POST['hzip'] == '') {
$errors->add('empty_hzip', "<strong>ERROR</strong>: Please enter home ZIP Code");
} else {
$hzip = $_POST['hzip'];
}
}
function my_register_extra_fields($user_id, $password="", $meta=array()) {
$userdata = array();
$userdata['ID'] = $user_id;
$userdata['first_name'] = $_POST['first'];
$userdata['last_name'] = $_POST['last'];
wp_update_user($userdata);
update_usermeta( $user_id, 'hzip', $_POST['hzip'] );
}
add_action( 'show_user_profile', 'my_show_extra_profile_fields' );
add_action( 'edit_user_profile', 'my_show_extra_profile_fields' );
function my_show_extra_profile_fields( $user ) {
$current_hzip = esc_attr( get_the_author_meta( 'hzip', $user->ID ) );
?>
<h3>Extra profile information</h3>
<table class="form-table">
<tr>
<th><label for="hzip">Home ZIP Code</label></th>
<td>
<input type="text" name="hzip" id="hzip" size="10" maxlength="10" value="<?php echo $current_hzip ?>" class="regular-text" />
</td>
</tr>
</table>
<?php
}
add_action( 'personal_options_update', 'my_save_extra_profile_fields' );
add_action( 'edit_user_profile_update', 'my_save_extra_profile_fields' );
function my_save_extra_profile_fields($user_id) {
if ( !current_user_can('edit_user', $user_id) ) {
return false;
}
update_usermeta( $user_id, 'hzip', $_POST['hzip'] );
}
Put the above in your functions.php
.
A fantastic plugin for displaying customizable lists of user is AmR User Lists
(Edit: Added user registration stuff.)
(Edit 2: Added custom data not normally saved by WordPress.)