使用PHP将文本写入.txt文件

Question

So I have page.txt which looks like this:

<textarea name="msg" rows="1"></textarea>
<form id="post" name="post" action="storeText.php" method="post">
    <input class="button" type="submit" value="Set news now"/>
</form>

I also have storeText.php which looks like this:

<?php       
$filename = 'posts.txt';
$msg = (isset($_POST['msg']) ? $_POST['msg'] : null);

    // Let's make sure the file exists and is writable first.
    if (is_writable($filename)) {

    // In our example we're opening $filename in append mode.
    // The file pointer is at the bottom of the file hence
    // that's where $somecontent will go when we fwrite() it.
    if (!$handle = fopen($filename, 'a')) {
        echo "Cannot open file ($filename)";
        exit;
    }

    // Write $somecontent to our opened file.
    if (fwrite($handle, $msg) === FALSE) {
        echo "Cannot write to file ($filename)";
        exit;
    }

    echo "Success, wrote ($msg) to file ($filename)";

    fclose($handle);

    } else {
    echo "The file $filename is not writable";
    }
?>

Now it should write the text onto posts.txt but it always says "Success, wrote () to file...". Notice the empty parenthesis which should have my input.

Any ideas? Thanks!

Answer 1

<textarea name="msg" rows="1"></textarea>
<form id="post" name="post" action="storeText.php" method="post">
    <input class="button" type="submit" value="Set news now"/>
</form>

If the textarea is outside of the form block it won't be sent. So your html should look like:

<form id="post" name="post" action="storeText.php" method="post">
    <textarea name="msg" rows="1"></textarea>
    <input class="button" type="submit" value="Set news now"/>
</form>

Answer 2

Your <textarea> element is outside of your <form> tags.

<textarea> should either go inside the form tags or you need to specify a form attribute to link the input to a form eg <textarea form="myForm"> (the latter may not work in older browsers, though, best to put it inside the <form> tag if you can).

That's why your $_POST['msg'] is null