js 调用php文件

function callPHP() {
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) {
            document.getElementById("result").innerHTML = xhr.responseText;
        }
    };
    var data = "name=John&age=30";
    xhr.open("POST", "example.php", true);
    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhr.send(data);
}

<?php
$name = $_POST['name'];
$age = $_POST['age'];
echo "Hello, " . $name . "! You are " . $age . " years old.";
?>

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST");
header("Access-Control-Allow-Headers: Content-Type");

xhr.timeout = 10000; // 设置超时时间为10秒
xhr.ontimeout = function() {
    alert("Request timed out");
};

error_log("Received data: " . print_r($_POST, true));