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<!DOCTYPE html> <html> <body> <h2>从 PHP 文件获取 JSON 格式的数据，并将其转换为 JavaScript 数组。</h2> <p id="demo"></p> <script> var xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { var myObj = JSON.parse(this.responseText); document.getElementById("demo").innerHTML = myObj[2]; } }; xmlhttp.open("GET", "demo_file_array.php", true); xmlhttp.send(); </script> </body> </html>