无法使用PHP $ _POST数组检索输入字段值

Question

I cannot get the $_POST['value'] after form submission.

I have used javascript to assign a value to an input field. code:

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

The above function is called by a popup widow to assign a value to my input field: pid

Here is the form script:

<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>

In my test.php, I have done:

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);   
}

But I am getting the error: Undefined index: project_name

Answer 1

Disabled inputs doesnt post. Use hidden input like this:

<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>