WordPress后台提供了个人信息的编辑，但是当一个新用户注册的时候有可能会想要添加更多的个人信息，比如Web站点的URL，电话号码，地址，性别等等，其实添加这些额外的字段都很简单。只需在functions.php添加一下代码

<?php
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="address"><?php _e("Address"); ?></label></th>
<td>
<input type="text" name="address" id="address" value="<?php echo esc_attr( get_the_author_meta( 'address', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description"><?php _e("Please enter your address."); ?></span>
</td>
</tr>
<tr>
<th><label for="city"><?php _e("City"); ?></label></th>
<td>
<input type="text" name="city" id="city" value="<?php echo esc_attr( get_the_author_meta( 'city', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description"><?php _e("Please enter your city."); ?></span>
</td>
</tr>
<tr>
<th><label for="province"><?php _e("Province"); ?></label></th>
<td>
<input type="text" name="province" id="province" value="<?php echo esc_attr( get_the_author_meta( 'province', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description"><?php _e("Please enter your province."); ?></span>
</td>
</tr>


<tr>
<th><label for="postalcode"><?php _e("Postal Code"); ?></label></th>
<td>
<input type="text" name="postalcode" id="postalcode" value="<?php echo esc_attr( get_the_author_meta( 'postalcode', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description"><?php _e("Please enter your postal code."); ?></span>
</td>
</tr>

<tr>
<th><label for="phone"><?php _e("Phone"); ?></label></th>
<td>
<input type="text" name="phone" id="phone" value="<?php echo esc_attr( get_the_author_meta( 'phone', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description"><?php _e("Please enter your phone number."); ?></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, 'address', $_POST['address'] );
update_user_meta( $user_id, 'city', $_POST['city'] );
update_user_meta( $user_id, 'province', $_POST['province'] );
update_user_meta( $user_id, 'postalcode', $_POST['postalcode'] );
update_user_meta( $user_id, 'phone', $_POST['phone'] );
}
?>