WordPress User Model for CodeIgniter

The User Model class bellow is based in WordPress user functions, which makes it easier for WordPress developers to apply the same functions and syntax to their CodeIgniter Web Applications.

The database structure is based in WordPress tables using “ci_” prefix.
Uses the same password hashing of WordPress (PHPpass)
Authentication function included: Login, Register
Helper functions: update_usermeta, add_usermeta, delete_usermeta, add_user, delete_user, update_user

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<?php
/**
* User_model
*
* @author Carl Victor Fontanos
* @authorurl www.carlofontanos.com
* @version 1.0
*
*/

if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class User_model extends CI_Model {

public function __construct() {
parent::__construct();
}

public function login($user_email, $user_pass) {

$query_password = $this->db->get_where('ci_users', array('user_email' => $user_email), 1, 0);
$user = $query_password->row();

if($this->passwordhash->CheckPassword($user_pass, $user->user_pass)) {

$newdata = array(
'ID' => $user->ID,
'logged_in' => TRUE
);

$this->session->set_userdata($newdata);

return true;
}
return false;
}

public function add_user($username, $email, $password) {

$user_data = array(
'user_login' => $username,
'user_email' => $email,
'user_pass' => $this->passwordhash->HashPassword($password),
'user_registered' => date("Y-m-d H:i:s", time()),
'user_nicename' => url_title($email, 'dash', TRUE),
);

$cleaned_data = $this->security->xss_clean($user_data);

$this->db->insert('ci_users', $user_data);

$this->db->select('ID');
$user_check = $this->db->get_where('ci_users', array('user_email' => $email), 1, 0);

if($user_check->num_rows() > 0){
$user = $user_check->row();
return $user->ID;
} else {
return false;
}

}

public function add_user_meta($user_id, $meta_key, $meta_value) {

$user_metadata = array(
'user_id' => $user_id,
'meta_key' => $meta_key,
'meta_value' => $meta_value
);

$cleaned_data = $this->security->xss_clean($user_metadata);

$this->db->insert('ci_usermeta', $cleaned_data);

$add_meta_check = $this->db->get_where('ci_usermeta', array('user_id' => $user_id, 'meta_key' => $meta_key, 'meta_value' => $meta_value), 1, 0);

if($add_meta_check->num_rows() > 0){
return true;
} else {
return false;
}
}

public function update_user_meta($user_id, $meta_key, $meta_value) {

$meta_exits = $this->db->get_where('ci_usermeta', array('user_id' => $user_id, 'meta_key' => $meta_key), 1, 0);

if($meta_exits->num_rows() > 0){

$user_metadata = array(
'meta_value' => $meta_value
);

$cleaned_data = $this->security->xss_clean($user_metadata);

$this->db->where(array('user_id' => $user_id, 'meta_key' => $meta_key));
$this->db->update('ci_usermeta', $cleaned_data);

$update_meta_check = $this->db->get_where('ci_usermeta', array('user_id' => $user_id, 'meta_key' => $meta_key, 'meta_value' => $meta_value), 1, 0);

if($update_meta_check->num_rows() > 0){
return true;
} else {
return false;
}

} else {
self::add_user_meta($user_id, $meta_key, $meta_value);
return true;

}

}

public function delete_user_meta($user_id, $meta_key = '') {

if(!empty($meta_key)){
$user_metadata = array(
'user_id' => $user_id,
'meta_key' => $meta_key
);
} else {
$user_metadata = array(
'user_id' => $user_id
);
}

$cleaned_data = $this->security->xss_clean($user_metadata);

$this->db->where($cleaned_data);
$this->db->delete('ci_usermeta');

$delete_meta_check = $this->db->get_where('ci_usermeta', $user_metadata, 1, 0);

if($delete_meta_check->num_rows() == 0){
return true;
} else {
return false;
}

}

public function get_user_meta($user_id, $key = '', $single = TRUE) {

$where = '';

if($key){
$where .= ' AND meta_key = "'.$key.'"';
}

$user_meta = $this->db->query('SELECT * FROM ci_usermeta WHERE user_id = ?'.$where, array($user_id) );

if($single){

$row = $user_meta->row();
if($row){
return $row->meta_value;
} else {
return '';
}

} else {
return $user_meta->result();
}

}

public function update_user($userdata_array) {

extract($userdata_array);
$data = '';

if(!empty($user_login)){
$data['user_login'] = $user_login;
}
if(!empty($user_email)){
$data['user_email'] = $user_email;
$data['user_nicename'] = url_title($user_email, 'dash', TRUE);
}
if(!empty($user_pass)){
$data['user_pass'] = $this->passwordhash->HashPassword($user_pass);
}

$cleaned_data = $this->security->xss_clean($data);

$this->db->update('ci_users', $cleaned_data);

}

public function delete_user($user_id) {

$this->db->delete('ci_users', array('ID' => $user_id));
self::delete_user_meta($user_id);

$delete_check = $this->db->query('SELECT * from ci_users u LEFT JOIN ci_usermeta um ON u.ID = um.user_id WHERE u.ID = ?', array($user_id) );

if($delete_check->num_rows() == 0){
return true;
} else {
return false;
}
}

}

Usage

In your controller “___construct” function, load the user_model:

1	$this->load->model('user_model');

Then in your PAGE controller, assign the model into a variable:

1	$data['user'] = $this->user_model;

In your View, you can call the functions like this:

1	<?php echo $user->get_user_meta($current_user->ID, 'first_name'); ?>

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