将变量传递到.txt文件

Question

我试图将变量从html表单传递到.php脚本，然后从.php脚本传递到存储变量值的.txt文件。 问题是，当我测试脚本而不是发布变量号时，它只是发布了变量名“ numberVariable”。

html / javascript

    <form id="payment-form" action="chargeCard.php" method="POST" name="payment-form">
                            <input onkeypress="return isNumberKey(event)" type="text" name="amount" id="amount" />
                            <input type="hidden" id="numberVariable" name="numberVariable" value="numberVariable"/> <!--this is where I try to pass the variable to the .php script-->
                            <input type="image"  src="Button1.png" id="customButton" value="pay" alt="button"/>

                            </form>

    <script type="text/javascript">
                            function isNumberKey(evt)
                        {
                        var charCode = (evt.which) ? evt.which : event.keyCode
                        if (charCode > 31 && (charCode < 48 || charCode > 57))
                        return false;

                        return true;
                        }
                        </script>

<script type="text/javascript"> 

                            var numberVariable= 1; //this is the variable I am trying to pass to the .php script to then pass the value to the .txt file

                            document.getElementById("numberVariable").innerHTML = numberVariable;
                            document.getElementByID("numberVariable").value = numberVariable;

                        </script>

的PHP

<?php 

    require_once('./stripe-php/init.php');

    \Stripe\Stripe::setApiKey("removed for safety");

    $token = $_POST['stripeToken'];
    $myAmount = $_POST['amount'];
    $describtion = $_POST['description'];

    $numberVariable= $_POST['numberVariable']; //this is where I get the variable from the form

    $myAmount = round((int)$myAmount*100,0);

    try {
    $charge = \Stripe\Charge::create(array(
    "amount" => $myAmount,
    "currency" => "usd",
    "source" => $token,
    "description" => $describtion));

    //PASTE VARIABLE TO .TXT FILE START

    $filename = "iPhoneAuctionBids.txt";
    $content = file_get_contents($filename);
    $content .= $numberVariable. PHP_EOL;
    file_put_contents($filename, $content);

    //PASTE VARIABLE TO .TXT FILE END

    } catch(\Stripe\Error\Card $e) {
    }

?>

Answer 1

您对文件不做任何事情。

您需要打开文件并将该值写入其中。

$filename = "iPhoneAuctionBids.txt"; 
$content = file_get_contents($filename);
$content .= $numberVariable . PHP_EOL;
file_put_contents($filename, $content);

另外，在对DOM执行任何js处理之前，您可能需要等待html生成。 只需将您的JS代码放入其中

window.onload(function(){
// here
});

Answer 2

您必须实际打开文件并将新数据写入其中。 您要做的只是使用文件名设置本地变量，不打开它，也不获取内容。 首先需要阅读http://php.net/manual/en/function.fopen.php 。