在PHP中保存文件时出现问题（“无法打开流：没有此类文件或目录”）

Question

I am simply trying to save a file containing the serialized values of a form.

The Simple Form

    <h2>PHP Form Validation Example</h2>
    <form form method="post"> 
       First Name: <input type="text" name="fname" value="

      <?PHP 

      echo ($_POST['fname']) 

      ?>">

<br><br>
   <input type="submit" name="Save" value="Save Current Form"> 
   Save File Name As: <input type="text" name="saveFile">
   <br><br>
   <input type="submit" name="Load" value="Load Old Form">      
       Load File: <input type="text" name="loadFile">

    </form>

When i save/load the file i use the PHP code:

<?php

if (isset($_POST['Save'])) {

$PostArray = $_POST;
$s = base64_encode(serialize($PostArray)); 
$file = sprintf('/SavedForms/%s',$_POST['saveFile']);
file_put_contents($file, $s);

}

if (isset($_POST['Load'])) {

$file = sprintf("/SavedForms/%s",$_POST['loadFile']);
$_POST = unserialize(base64_decode(file_get_contents($file)));

}
?>

But it simply tells me

(when i try the save the file name "aaa")

that: " Warning: file_put_contents(/SavedForms/aaa) [function.file-put-contents] : failed to open stream: No such file or directory in"

I already have created the directory /SavedForms/ in the file as seen in the image below...

Could someone please let me know what i am doing wrong here!?!?

Answer 1

Remove the leading forward slash from the directory:

$file = sprintf('SavedForms/%s',$_POST['saveFile']);

Assuming that SavedForms is in the same directory as the executing php script.

Paths are relative to the script. By putting a leading slash, you are declaring an absolute path from the very root directory of your machine. This means it is currently looking for SavedForms in the root directory, and of course, it fails to find it