我坚持通过PHP获取复选框的状态。我花了两个多小时在谷歌尝试不同的方法，但似乎没有任何工作......
基本上我需要逻辑说“如果没有检查，添加错误”。
我尝试过以下方法：
if(!isset($_POST['terms_and_conditions'])){
$this->addError("You must agree to our terms and conditions");
}
if(isset($_POST['terms_and_conditions']) && $_POST['terms_and_conditions'] == 'true'){
$this->addError("You must agree to our terms and conditions");
}
if(!isset($_POST['terms_and_conditions']) && !$_POST['terms_and_conditions'] == 'true'){
$this->addError("You must agree to our terms and conditions");
}
if($_POST['terms_and_conditions'] == "false"){
$this->addError("You must agree to our terms and conditions");
}
if($_POST['terms_and_conditions'] == false){
$this->addError("You must agree to our terms and conditions");
}
以下是复选框的代码：
<div id="field">
<input type="checkbox" value="false" name="terms_and_conditions" id="terms_and_conditions"/> <label for="terms_and_conditions">By clicking this you agree to this site's <a href="terms_and_conditions.php">Terms and Conditions</a></label>
</div>
if(isset($_POST['terms_and_conditions'])){
$this->addError("You must agree to our terms and conditions");
}
但是如果我尝试将其设为负片，即：带有感叹号“！”什么都没显示？
最好的解决方法是什么？
谢谢你的时间！
更新
这是register.php文件：
<?php
require 'core/init.php';
include_once 'includes/files/overall/header_main.php';
$error_array = array();
if(Input::exists()) {
if(Token::check(Input::get('token'))) {
$validate = new Validate();
$validation = $validate->check($_POST, array(
'username' => array(
'required' => true,
'min' => 2,
'max' => 20,
'unique' => 'users'),
'password' => array(
'required' => true,
'min' => 3),
'password_again' => array(
'required' => true,
'matches' => 'password'),
'name' => array(
'required' => false,
'min' => 2,
'max' => 50)
));
if($validation->passed()) {
$user = new User();
$bcrypt = new Bcrypt();
try {
$user->create(array(
'username' => Input::get('username'),
'password' => $bcrypt->hash(Input::get('password')),
'name' => Input::get('name'),
'joined' => date('Y-m-d H:i:s'),
'group' => 1
));
Session::flash('home', 'You have been registered and can now log in!');
Redirect::to('index.php');
} catch(Exception $e) {
die($e->getMessage());
}
} else {
foreach($validate->errors() as $error) {
echo $error, '<br>';
}
}
}
}
?>
<section id="aside">
<aside class="register">
</aside>
</section>
<section id="main_content">
<h1>Sign Up</h1>
<p class="bigger">Join 1000's of <b>docimes</b> and meet new companions - it's easy!</p>
<?php
if(!empty($error_array)){
echo '<ul>';
foreach($error_array as $error){
echo '<li>'. $error .'</li>';
}
echo '</ul>';
}
?>
<form action="" method="post">
<div id="field">
<label for="name">Name</label>
<input type="text" name="name" value="<?php echo escape(Input::get('name')); ?>" placeholder="name" />
</div>
<div id="field">
<label for="surname">Surname</label>
<input type="text" name="surname" value="<?php echo escape(Input::get('surname')); ?>" placeholder="Surname" />
</div>
<div id="field">
<label for="email">Email</label>
<input type="text" name="email" value="<?php echo escape(Input::get('email')); ?>" placeholder="Email" />
</div>
<div id="field">
<label for="username">Username</label>
<input type="text" name="username" value="<?php echo escape(Input::get('username')); ?>" placeholder="Username" />
</div>
<div id="field">
<label for="password">Password</label>
<input type="password" name="password" value="" placeholder="Password" />
</div>
<div id="field">
<label for="password_again">Password again</label>
<input type="password" name="password_again" value="" placeholder="Password again" />
</div>
<input type="hidden" name="token" value="<?php echo Token::generate(); ?>"/>
<input type="submit" value="Signup" />
<div id="field">
<input type="checkbox" value="" name="terms_and_conditions" id="terms_and_conditions"/> <label for="terms_and_conditions">By clicking this you agree to this site's <a href="terms_and_conditions.php">Terms and Conditions</a></label>
</div>
</form>
</section>
<?php
include_once 'includes/files/overall/footer_main.php';
?>
和validate.php类：
<?php
class Validate {
private $_passed = false,
$_errors = array(),
$_db = null;
public function __construct() {
$this->_db = DB::getInstance();
}
public function check($source, $items = array()) {
foreach($items as $item => $rules) {
foreach($rules as $rule => $rule_value) {
$value = trim($source[$item]);
if($rule === 'required' && $rule_value === true && empty($value)) {
$this->addError("{$item} is required.");
} else if (!empty($value)) {
switch($rule) {
case 'min':
if(strlen($value) < $rule_value) {
$this->addError("{$item} must be a minimum of {$rule_value} characters.");
}
break;
case 'max':
if(strlen($value) > $rule_value) {
$this->addError("{$item} must be a maximum of {$rule_value} characters.");
}
break;
case 'matches':
if($value != $source[$rule_value]) {
$this->addError("{$rule_value} must match {$item}.");
}
break;
case 'unique':
$check = $this->_db->get('users', array($item, '=', $value));
if($check->count()) {
$this->addError("{$item} is already taken.");
}
break;
case 'accepted':
if($rule === 'accepted' && $rule_value === true){
$this->addError("You must agree to our terms and conditions");
}
break;
}
}
}
}
if(empty($this->_errors)) {
$this->_passed = true;
}
return $this;
}
protected function addError($error) {
$this->_errors[] = $error;
}
public function passed() {
return $this->_passed;
}
public function errors() {
return $this->_errors;
}
}
答案 0 :(得分：2)
当用户检查时，复选框的值将设置为false。因为在您的HTML中，您有<input type="checkbox" value="false"。如果您希望在用户检查时将值设置为value="true"，则需要true。
但是，使用当前代码时，如果用户未选中复选框但您说他们没有，则应执行第二个和最后一个错误。你必须仔细检查一下。
答案 1 :(得分：0)
不要测试== true（实际上检查时的默认值是“on”。如果选中该复选框，它将显示isset。
if(!isset($_POST['terms_and_conditions'])){
$this->addError("You must agree to our terms and conditions");
}
print_r（$ _ POST）在发布后显示了什么？ 要将复选框默认为关闭，只需将值留空。
<强>更新
From here: VALUE不会影响复选框的选中状态。如果要将复选框默认设置为打开，请使用CHECKED。相反，如果用户选中该复选框，VALUE将设置发送到服务器的值。如果未选中该复选框，则不会向服务器发送任何类型的值（isset() == false）。默认情况下，复选框会发送。
如果您没有获得此值，则以下是代码的完全简化版本，以便您可以看到应该发生的事情。当用户点击该复选框时，帖子将返回$_POST['terms_and_conditions']=='on'然后您可以重新添加代码片段，以查看哪些内容无效。
<h1>Sign Up</h1>
<p class="bigger">Join 1000's of <b>docimes</b> and meet new companions - it's easy!</p>
<?php
var_dump($_POST);
?>
<form action="" method="post">
<div id="field">
<label for="name">Name</label>
<input type="text" name="name" value="<?php echo 'name'; ?>" placeholder="name" />
</div>
<div id="field">
<label for="surname">Surname</label>
<input type="text" name="surname" value="<?php echo 'surname'; ?>" placeholder="Surname" />
</div>
<div id="field">
<label for="email">Email</label>
<input type="text" name="email" value="<?php echo 'email'; ?>" placeholder="Email" />
</div>
<div id="field">
<label for="username">Username</label>
<input type="text" name="username" value="<?php echo 'username'; ?>" placeholder="Username" />
</div>
<div id="field">
<label for="password">Password</label>
<input type="password" name="password" value="" placeholder="Password" />
</div>
<div id="field">
<label for="password_again">Password again</label>
<input type="password" name="password_again" value="" placeholder="Password again" />
</div>
<input type="hidden" name="token" value="<?php echo 'abc'; ?>"/>
<input type="submit" value="Signup" />
<div id="field">
<input type="checkbox" name="terms_and_conditions" id="terms_and_conditions"/> <label for="terms_and_conditions">By clicking this you agree to this site's <a href="terms_and_conditions.php">Terms and Conditions</a></label>
</div>
</form>
答案 2 :(得分：0)
永远不要将复选框的值设为TRUE或FALSE。
<input type="checkbox" value="something" name="terms_and_conditions" >
-----------^