js给php赋值

// 使用Fetch API发送AJAX请求
fetch('server.php', {
    method: 'POST',
    headers: {
        'Content-Type': 'application/json'
    },
    body: JSON.stringify({ key: 'value' })
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

<?php
// 获取POST请求的原始数据
$json = file_get_contents('php://input');
$data = json_decode($json, true);

// 处理数据
$value = $data['key'];

// 返回响应
echo json_encode(['status' => 'success', 'received' => $value]);
?>

<form id="myForm" action="server.php" method="POST">
    <input type="hidden" id="hiddenField" name="hiddenField">
</form>

<script>
document.getElementById('hiddenField').value = 'someValue';
document.getElementById('myForm').submit();
</script>

<?php
// 获取表单提交的数据
$value = $_POST['hiddenField'];

// 处理数据
echo "Received value: " . $value;
?>

var value = 'someValue';
window.location.href = 'server.php?param=' + encodeURIComponent(value);

<?php
// 获取URL参数
$value = $_GET['param'];

// 处理数据
echo "Received value: " . $value;
?>