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是否可以使用onsubmitJavaScript 从PHP调用函数？如果是这样,有人能给我一个如何做的例子吗？

function addOrder(){
    $con = mysql_connect("localhost", "146687", "password");
    if(!$con){
        die('Could not connect: ' . mysql_error())
    }

    $sql = "INSERT INTO orders ((user, 1st row, 2nd row, 3rd row, 4th row)
    VALUES ($session->username,1st variable, 2nd variable, 3rd variable, 4th variable))";

    mysql_query($sql,$con)
    if(mysql_query($sql,$con)){
        echo "Your order has been added";
    }else{
        echo "There was an error adding your order to the databse: " . mysql_error();
    }
}

这是我想要打电话的功能.它是一个订购系统,您输入您想要的每件商品的数量,点击提交,它应该将订单添加到表中.

我有一个带有以下js函数的index.php:

function returnImageString() {
    return "<?php include 'inc/image.functions.php'; echo getRandomImages(7); ?>";        //This isn't dynamic; this will always return the same images.  How do I fix this?
}

但是,当页面加载时,调用php脚本并将结果添加到源代码中,如下所示:

function returnImageString() {
    return "images/20.11.A1B9.jpg|images/8.14.47683.jpg|images/19.10.FBB9.jpg|images/21.12.9A.jpg|images/8.11.1474937909.jpg|images/8.15.99404.jpg|images/8.10.jpg|"; //This isn't dynamic; this will always return the same images. How do I fix this?
 }

我想要发生的是每当我调用js函数(returnImageString)时,我希望它每次调用php函数(因为php函数返回一串随机图像位置),而不是在js函数中对字符串进行硬编码.

有人能指出我正确的方向吗？谢谢!