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<!DOCTYPE html> <html> <body> <h2>使用 HTTP 方法 POST 将数据发送到 PHP 文件。</h2> <p id="demo"></p> <script> var obj, dbParam, xmlhttp, myObj, x, txt = ""; obj = { "limit":10 }; dbParam = JSON.stringify(obj); xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { myObj = JSON.parse(this.responseText); for (x in myObj) { txt += myObj[x].name + "<br>"; } document.getElementById("demo").innerHTML = txt; } }; xmlhttp.open("POST", "json_demo_db_post.php", true); xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xmlhttp.send("x=" + dbParam); </script> <p>尝试将“limit”属性从 10 改为 5。</p> </body> </html>