将php变量传递给javascript [英] pass php variable to javascript

问题描述

我的表格中有一个名为pid的下拉列表和一个提交按钮。当单击提交按钮时，我想将下拉列表（pid）中选择的值传递给javascript中的此var target_id。

I have a dropdown list with name pid and a submit button in my form. when submit button is clicked i want to pass the value selected in the dropdown list (pid) to this var target_id in the javascript.

<script>
function send(fid)
{
var uid=fid;
alert('ID IS: '+uid);
}
</script>

echo "<select name='pid'>";
//this is in a for loop
echo "<option value=".$id.">".$id."</option>";
//for loop ends
</select>
<input type='submit' value='send' name='send' onclick='send(pid)' id='send'/>

我在这里做错了什么？

推荐答案

一旦PHP呈现为HTML，它就不再是将PHP传递给Javascript的问题，而是一个问题或如何使用Javascript从HTML获取值。是否会为该功能添加onclick调用以适用于您要执行的操作？

Once the PHP renders into HTML it becomes less a question of passing PHP to Javascript and more a question or how to get the value from the HTML with Javascript. Would adding an onclick call to the function work for what you are trying to do?

<input type="submit" value="Submit" onclick="send(this.form.pid.value);return false;">

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