我如何在JavaScript中调用此php函数？

Question

我试图通过按下按钮（创建）来调用这个php函数。

<?php
$myfile = fopen("details.txt", "a") or die("Unable to open file!");
$txt = "John Smith\n";
fwrite($myfile, $txt);
$pwd = "123456\n";
fwrite($myfile, $pwd);
fclose($myfile);
?>

我在JS中试过这个： function Create（）{

<?php
$myfile = fopen("Details.txt", "a") or die("Unable to open file!");
$txt = "John Smith\n";
fwrite($myfile, $txt);
$pwd = "123456\n";
fwrite($myfile, $pwd);
fclose($myfile);
?>

}

，这在html中

<form name="userForm" onsubmit="return validateForm()" >

                 Enter your name:<br> <input type="text" name="name" id="name"> <br>
                Enter your password: <br><input type ="password" name="password"                         id="password">

                <br>
                <button type="submit" onclick=" return validateForm()">Login</button>
                 <br>
                <button type="submit" onclick="Create()">Create</button>
            </form>