PHP中复杂数据结构在HTML表单中的传递与处理：JSON序列化与反序列化实践

$valid_time = [
    'Monday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Tuesday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    // ... 其他日期
];

<input type="hidden" name="valid_time[]" value="<?php print_r($valid_time); ?>">

<?php
// 假设这是你的PHP数组
$valid_time = [
    'Monday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Tuesday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Wednesday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Thursday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Friday' => ['start_time' => '10:00:00', 'end_time' => '17:00:00'],
    'Saturday' => ['start_time' => '10:00:00', 'end_time' => '12:00:00'],
    'Sunday' => ['start_time' => '10:00:00', 'end_time' => '12:00:00'],
];

// 1. 将数组编码为JSON字符串
$json_encoded_time = json_encode($valid_time);

// 2. 对JSON字符串进行HTML实体转义
$html_escaped_json = htmlspecialchars($json_encoded_time, ENT_QUOTES, 'UTF-8');
?>

<form action="process_form.php" method="POST">
    <!-- 将转义后的JSON字符串作为隐藏域的值 -->
    <input type="hidden" name="valid_time_data" value="<?php echo $html_escaped_json; ?>">
    <button type="submit">提交表单</button>
</form>

<?php
// process_form.php
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['valid_time_data'])) {
    $received_json_string = $_POST['valid_time_data'];

    // 1. 将JSON字符串反序列化回PHP数组
    // 传入 true 参数表示将JSON对象解码为关联数组，而不是标准对象
    $decoded_valid_time = json_decode($received_json_string, true);

    // 检查解码是否成功以及结果是否为数组
    if (json_last_error() === JSON_ERROR_NONE && is_array($decoded_valid_time)) {
        echo "成功解码数据，现在可以遍历了：<br>";
        print_r($decoded_valid_time);

        // 示例：遍历数据
        foreach ($decoded_valid_time as $day => $times) {
            echo "<p>{$day}: 开始时间 {$times['start_time']}, 结束时间 {$times['end_time']}</p>";
        }
    } else {
        echo "数据解码失败或格式不正确。<br>";
        echo "JSON错误信息: " . json_last_error_msg();
    }
} else {
    echo "未接收到表单提交数据。";
}
?>