submit.php

<?php
session_start();
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $userName = htmlspecialchars($_POST['entry_963022265']);

    $url = 'https://script.google.com/macros/s/AKfycbwC1padrK7WN0DOKsCQyrOKWIiV3fFl2MErOoPSxD6rcHR8YrEymZEJdP6Aez_uiqTe/exec';

    $data = json_encode([
        [
            'username' => $userName,
        ]
    ]);

function generateRandomString($length = 10) {
    return substr(str_shuffle("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"), 0, $length);
}

function saveToJSON($username, $filename = "random.json") {
    $randomKey = generateRandomString(10);
    
    if (file_exists($filename)) {
        $jsonData = json_decode(file_get_contents($filename), true);
    } else {
        $jsonData = [];
    }

    $jsonData[$username] = ["key" => $randomKey];

    file_put_contents($filename, json_encode($jsonData, JSON_PRETTY_PRINT));

    return $randomKey;
}

$key = saveToJSON($userName);
$_SESSION['key'] = $key;
$_SESSION['username'] = $userName;

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

    $response = curl_exec($ch);
    curl_close($ch);
    
    // JSONファイルにデータを保存
    $filePath = 'inquiry.json';
    if (file_exists($filePath)) {
        $existingData = json_decode(file_get_contents($filePath), true);
        if (!is_array($existingData)) {
            $existingData = [];
        }
    } else {
        $existingData = [];
    }

    $newData = [
        'entry_963022265' => $userName,
    ];

    $existingData[] = $newData;
    file_put_contents($filePath, json_encode($existingData, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));;
}
header('Location: index.php#contact'); 
exit();
?>