Question

我正在从输入字段发送多个具有相同名称的值。当我只发送custom1和var 2，但我也想添加一个javascript变量var3，但是使用document.getElemendById分配值时，它会完全覆盖输入字段，并且custom1和var2丢失。因此，如何在末尾添加一个javascript变量var3，使其在数组索引$ pieces [2]下显示；在v.php文件中。

yy <- yy %>% 
       group_by(fundId) %>% 
       mutate(StockDiff = apply(yy,2,function(x){
                    paste(setdiff(unlist(strsplit(x[5], split = ",")), unlist(strsplit(x[4], 
                                                            split = ","))),collapse = ",")}))

v.php

 <!DOCTYPE html>
    <html>
    <head>
        <title></title>
    </head>
    <body>
        <?php $var2 = "custom2" ?>
    <form action="v.php" method="POST" >
    <input id="jsvar" type="text" name="custom" value="custom1,<?php echo $var2; ?>">
    <input type="submit" name="" value="send">
    </form>
    <script type="text/javascript">
            var var3 = "custom3";
            document.getElementById("jsvar").value = var3;
        </script>
    </body>
    </html>

Answer 1

您可以追加数据，而不是用新数据替换。

var var3 = "custom3";
document.getElementById("jsvar").value += ","+var3;

Answer 2

请在下面尝试。一切正常。在屏幕Link

下查看

<!DOCTYPE html>
    <html>
    <head>
        <title></title>
    </head>
    <body>
        <?php $var2 = "custom2" ?>
    <form action="v.php" method="POST" >
    <input id="jsvar" type="text" name="custom" value="custom1,<?php echo $var2; ?>">
    <input type="submit" name="" value="send">
    </form>
    <script type="text/javascript">
            var pre_value=document.getElementById("jsvar").value;
            var var3 = "custom3";
            var new_value = pre_value +','+var3;
            document.getElementById("jsvar").value = new_value;
        </script>
    </body>
    </html>

如何同时发送php和javascript变量作为输入字段值？

2 个答案: