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POCannot redeclare user_data() error
 

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    <p>i am creating a user accounts system for my website however when i use the <code>include 'core/init.php';</code> function i get the error. This could be something really simple as I am a beginner and just learning. </p> <pre><code>Fatal error: Cannot redeclare user_data() (previously declared in C:\xampp\htdocs\PatchMyPC\core\functions\users.php:3) in C:\xampp\htdocs\PatchMyPC\core\functions\users.php on line 17 </code></pre> <p>here is the code for my users.php &amp; init.php files</p> <p>init.php</p> <pre><code>&lt;?php session_start(); //error_reporting(0); require 'database/connect.php'; require 'functions/users.php'; require 'functions/general.php'; if (logged_in() === true) { $session_user_id = $_SESSION['user_id']; $user_data = user_data($session_user_id, 'user_id', 'username', 'password', 'first_name', 'last_name', 'email'); if (user_active($user_data['username']) === false) { session_destroy(); header('Location: index.php'); exit(); } } $errors = array(); ?&gt; </code></pre> <p>users.php</p> <pre><code>&lt;?php function user_data($user_id) { $data = array(); $user_id = (int)$user_id; $func_num_args = func_num_args(); $func_get_args = func_get_args(); if ($func_num_args &gt; 1) { unset($func_get_args[0]); $fields = '`' . implode('`, `', $func_get_args) . '`'; $data = mysql_fetch_assoc(mysql_query("SELECT $fields FROM `users` WHERE `user_id` = $user_id")); return $data; } } function logged_in() { return (isset($_SESSION['user_id'])) ? true : false; } function user_exists($username) { $username = sanitize($username); return (mysql_result($query = mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username'"), 0) == 1) ? true : false; } function user_active($username) { $username = sanitize($username); return (mysql_result($query = mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username' AND `active` = 1"), 0) == 1) ? true : false; } function user_id_from_username($username) { $username = sanitize($username); return mysql_result(mysql_query("SELECT `user_id` FROM `users` WHERE `username` = '$username'"), 0, 'user_id'); } function login($username, $password) { $user_id = user_id_from_username($username); $username = sanitize($username); $password = md5($password); return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username' AND `password` = '$password'"), 0) ==1) ? $user_id : false; } ?&gt; </code></pre>
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    1. COSounds like you are either declaring the same function twice or including the same file twice. use `require_once()` instead of `require()`.
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      1. USMichael Berkowski
    2. CO[**Please, don't use `mysql_*` functions in new code**](http://bit.ly/phpmsql). They are no longer maintained [and are officially deprecated](http://j.mp/XqV7Lp). See the [**red box**](http://j.mp/Te9zIL)? Learn about [*prepared statements*](http://j.mp/T9hLWi) instead, and use [PDO](http://php.net/pdo) or [MySQLi](http://php.net/mysqli) - [this article](http://j.mp/QEx8IB) will help you decide which.
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