如何使用jquery获取textfield的值并将其分配给php变量


How to get the value of textfield using jquery and assign it to php variable

我有一个简单的网页,它从输入框中获取值,并将其传递到下一个页面或表单。唯一的问题是我不知道如何使用jquery来获取值并将其分配为php值。我想把这个值传给URL

这是我的代码:

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
<?php
    print
        "<input type='text' class='form-control' id='usr'>".
        "<a href='calculate.php?id={45}&tt='><button class='btn btn-success'>Calculate</button></a>";
?>

如何将结果值传递给"<a href='calculate.php?id={45}&tt='>,其中tt是框的值?

感谢

您应该使用一个函数来获取值,并更改按钮以使用该函数:

因此,您的最终php代码将是:

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>

<script>
    function calculate() {
        var tt = $("#usr").val();
        location.href = "calculate.php?id={45}&tt=" + tt;
    }
</script>
<input type='text' class='form-control' id='usr'>
<button class='btn btn-success' onclick="calculate()">Calculate</button>

我删除了<php? print...,因为它只是普通的html。

对于这样的场景,使用jquery非常简单。

<?php
print
    "<input type='text' class='form-control' id='usr'>".
    "<a id='button' href='#'><button class='btn btn-success'>Calculate</button></a>";
?>

在这里,我已经添加了id属性到你的锚标签或链接,无论你叫它什么。

现在jquery部分:

<script type="text/javascript"> 
    $(document).ready(function(){
        var usr = $("#usr").val();
        $("#button").attr("href","calculate.php?id={45}&tt="+usr);
    });
</script>

或者,如果您希望在特定文本字段的值更改时更改url,那么您可以尝试以下操作。

<script type="text/javascript"> 
    $(document).ready(function(){
        $("#usr").change(function(){
            var usr = $("#usr").val();
            $("#button").attr("href","calculate.php?id={45}&tt="+usr);
        });            
    });
</script>

希望这能有所帮助。如果你想了解更多关于jquery变更事件的信息,那么你可以看看jquery变更活动

**********从这里编辑************

<!DOCTYPE html>
<html>
<head>
    <title>Whatever your title is</title>
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
    <!-- Latest compiled and minified JavaScript -->
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
</head>
<body>
    <?php
    print
        "<input type='text' class='form-control' id='usr'>".
        "<a id='button' href='#'><button class='btn btn-success'>Calculate</button></a>";
    ?>
    <script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
    <script type="text/javascript"> 
        $(document).ready(function(){
            $("#usr").change(function(){
                var usr = $("#usr").val();
                $("#button").attr("href","calculate.php?id={45}&tt="+usr);
            });            
        });
    </script>
</body>
</html>

因此,整个文件将看起来像下面的