projet-php/login.php

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<!DOCTYPE html>
<?php /* [0] VERIFICATION DE CONNECTION
=============================================*/
$postVariablesAreSet = isset($_POST['username']) && isset($_POST['mail']) && isset($_POST['password']) && isset($_POST['co']); // si les variables POST existent
$postVariablesTypeOk = $postVariablesAreSet && is_string($_POST['username']) && is_string($_POST['mail']) && is_string($_POST['password']) && is_string($_POST['co']); // si ce sont des string
$postVariablesNEmpty = $postVariablesTypeOk && strlen($_POST['username']) > 1 && strlen($_POST['mail']) > 1 && strlen($_POST['password']) > 1 && strlen($_POST['co']) > 1; // si au moins 1 caractère
$usernameCheck = $postVariablesNEmpty && preg_match("/^[\w -]{3,10}$/i", $_POST['username']); // utilisateur -> "alphanum_- " -> 3 à 10 caractères
$mailCheck = $usernameCheck && preg_match("/^[\w\.-]+@[\w\.-]+\.[a-z]{2,4}$/i", $_POST['mail']); // mail -> bon format
$passwordCheck = $mailCheck && preg_match("/^[\w -]{8,50}$/i", $_POST['password']); // password -> "alphanum_- " -> 8 à 50 caractères
$coCheck = $passwordCheck && $_POST['co'] == 'Me connecter';
if( $coCheck ){ // si toutes les valeurs sont correctes
$user = array(); // on définit l'utilisateur
$user['name'] = $_POST['username'];
$user['mail'] = $_POST['mail'];
$user['password'] = $_POST['password'];
$user['hash'] = sha1($_POST['password']);
}
// retourne VRAI si l'utilisateur est connecté
function connected($user){ return ($user != null); }
?>
<html>
<head>
<title>Tests php</title>
<meta charset='utf-8'/>
<meta name='description' value='Site de test'/>
<meta name='author' value='{xdrm} & SeekDaSky'/>
<link rel='stylesheet' href='globalstylesheet.css'/>
</head>
<body>
<?php /* [1] AFFICHAGE DIFFÉRÉ SI CONNECTÉ
==============================================*/
echo "<form action='#auth' method='POST'>";
/* AFFICHAGE D'ERREURS */
if( $postVariablesAreSet ){ // si formulaire soumis
if( !$postVariablesNEmpty )
echo '<span class=error>Certains champs requis sont vides.</span>';
elseif( !$usernameCheck )
echo '<span class=error>Nom d\'utilisateur incorrect. (3 car. min)</span>';
elseif( !$mailCheck )
echo '<span class=error>Adresse mail incorrecte.</span>';
elseif( !$passwordCheck )
echo '<span class=error>Mot de passe incorrect. (8 car. min)</span>';
elseif( connected($user) )
echo '<span class=success>Vous êtes connectés.</span>';
}
echo "<input type='text' name='username' placeholder='username' " .( (connected($user)) ? "value='".$user['name']."'" : '' ).">";
echo "<input type='mail' name='mail' placeholder='mail' " .( (connected($user)) ? "value='".$user['mail']."'" : '' ).">";
echo "<input type='password' name='password' placeholder='password' ".( (connected($user)) ? "value='".$user['password']."'" : '' ).">";
echo "<input type='submit' name='co' value='Me connecter'>";
echo "</form>";
?>
</body>
</html>