php - 无法使用 PHP $_POST 数组检索输入字段值

Question

提交表单后我无法获取$_POST['value']。

我使用 javascript 为输入字段赋值。 代码:

function updateValue(pid, value){
    // this gets called from the popup window and updates the field with a new value
    document.getElementById(pid).value = value;
}

上面的函数被弹出窗口调用，为我的输入字段赋值:pid

这是表单脚本:

<form action="test.php" method="post">
  <input type="text" name="project_name" id="pid" disabled="disabled" />
  <input type="submit" id="search" name="search" value="Search" />
</form>

在我的 test.php 中，我做了:

include 'functions.php'; //Has the connection script
if (isset($_POST['search'])){
    echo $project_id = $_POST['project_name'];
    $sql = mysql_query("SELECT * from item
                    where category like '$project_id %'
                    ");
    echo $num = mysql_num_rows($sql);   
}

但我收到错误:Undefined index: project_name

Answer 1

禁用的输入不会发布。像这样使用隐藏输入:

<form action="test.php" method="post">
  <input type="text" name="project" disabled="disabled" />
  <input type="hidden" name="project_name" id="pid" />
  <input type="submit" id="search" name="search" value="Search" />
</form>