I did a project sometime back where i added extra fields if the above doesnt work you can take a cue from this code
[ Moderator note: Please use backticks or the code button for code. It make the code much more readable. ]
add_action( 'show_user_profile', 'extra_user_profile_fields' );
add_action( 'edit_user_profile', 'extra_user_profile_fields' );
function extra_user_profile_fields( $user ) { ?>
<h3><?php _e("Extra profile information", "blank"); ?></h3>
<table class="form-table">
<tr>
<th><label for="gender"><?php _e("Gender"); ?></label></th>
<td>
<input type="text" name="gender" id="gender" value="<?php echo esc_attr( get_the_author_meta( 'gender', $user->ID ) ); ?>" class="regular-text" />
<span class="description"><?php _e("Enter your Gender."); ?></span>
</td>
</tr><tr>
<th><label for="designation"><?php _e("Designation"); ?></label></th>
<td>
<input type="text" name="designation" id="designation" value="<?php echo esc_attr( get_the_author_meta( 'designation', $user->ID ) ); ?>" class="regular-text" />
<span class="description"><?php _e("Please enter your designation."); ?></span>
</td>
</tr></table>
<?php }
add_action( 'personal_options_update', 'save_extra_user_profile_fields' );
add_action( 'edit_user_profile_update', 'save_extra_user_profile_fields' );
function save_extra_user_profile_fields( $user_id ) {
if ( !current_user_can( 'edit_user', $user_id ) ) { return false; }
update_user_meta( $user_id, 'gender', $_POST['gender'] );
update_user_meta( $user_id, 'designation', $_POST['designation'] );
}
