javascript - image retrieval from directory and session variable issues - php - Stack Overflow

admin管理员组

文章数量:1417555

I have a problem when retrieving the images from a directory on my server, so what the main sequence is: in a page (multiupload.php) I added the input, allowed the image to be previewed and when the user submitted, a new directory with their session id would be created, the images would then be stored in the unique directory and the page would then be directed to (drag.php). The newly loaded page has a canvas with different divs to controls filters that are attached to that canvas. My problem lies with retrieving the image with the specified s_id as a directory name from one page to the other.

Q: Am i retrieving session variables properly? or using them appropriately?

This is the necassary snippets from multiupload.php's upload script.

<?php
  $dir_id = session_id(md5(uniqid()));
  session_start($dir_id);
  $path = "uploads/";
  $dir = $path.$dir_id;
  $path = $path.$dir_id."/";
  if (file_exists($dir)) {
    system('/bin/rm -rf ' . escapeshellarg($dir));
  } else {
    mkdir($path);
    chmod($path, 0722);  
  }
  $_SESSION["id"] = $dir_id;
  $_SESSION["directory"] = "/" . $dir;
  $_SESSION["path_name"] = $path;
?>

I define the directory, whole path and the id for the directory. I would like to retrieve the id in the next page, but it's not doing it correctly.

and this is the retrieval code from drag.php

$realPath = 'uploads/'. echo $_SESSION['id'];

$handle = opendir(dirname(realpath(__FILE__)).$realPath;
while($file = readdir($handle)){
    if($file !== '.' && $file !== '..'){
        echo '<img src="uploads/'.$file.'" border="0" />';
    }
}

My end result is that I would like all images to be drawn on the page. For now I would like them to be drawn anywhere aslong as they're visible.

If my question isn't clear, feel free to edit or ment where I should change. If you need more code or information, please let me know.

I have a problem when retrieving the images from a directory on my server, so what the main sequence is: in a page (multiupload.php) I added the input, allowed the image to be previewed and when the user submitted, a new directory with their session id would be created, the images would then be stored in the unique directory and the page would then be directed to (drag.php). The newly loaded page has a canvas with different divs to controls filters that are attached to that canvas. My problem lies with retrieving the image with the specified s_id as a directory name from one page to the other.

Q: Am i retrieving session variables properly? or using them appropriately?

This is the necassary snippets from multiupload.php's upload script.

<?php
  $dir_id = session_id(md5(uniqid()));
  session_start($dir_id);
  $path = "uploads/";
  $dir = $path.$dir_id;
  $path = $path.$dir_id."/";
  if (file_exists($dir)) {
    system('/bin/rm -rf ' . escapeshellarg($dir));
  } else {
    mkdir($path);
    chmod($path, 0722);  
  }
  $_SESSION["id"] = $dir_id;
  $_SESSION["directory"] = "/" . $dir;
  $_SESSION["path_name"] = $path;
?>

I define the directory, whole path and the id for the directory. I would like to retrieve the id in the next page, but it's not doing it correctly.

and this is the retrieval code from drag.php

$realPath = 'uploads/'. echo $_SESSION['id'];

$handle = opendir(dirname(realpath(__FILE__)).$realPath;
while($file = readdir($handle)){
    if($file !== '.' && $file !== '..'){
        echo '<img src="uploads/'.$file.'" border="0" />';
    }
}

My end result is that I would like all images to be drawn on the page. For now I would like them to be drawn anywhere aslong as they're visible.

If my question isn't clear, feel free to edit or ment where I should change. If you need more code or information, please let me know.

• javascript
• php
• jquery
• html
• canvas

Share Improve this question Follow edited Apr 6, 2015 at 12:04 Legendary 2,2421818 silver badges2626 bronze badges asked Apr 1, 2015 at 15:10 BradleyIWBradleyIW 1,35833 gold badges2020 silver badges3737 bronze badges 2

• 3 Use this line $realPath = 'uploads/'.$_SESSION['id']; instead of $realPath = 'uploads/'. echo $_SESSION['id']; – Apoorv Bambarde Commented Apr 6, 2015 at 11:54
• Good interprettor @ApoorvBambarde . – Asif Mehmood Commented Apr 6, 2015 at 11:56

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 6 +50

Please modify your code to this code:

<?php
  $dir=$_SESSION['id'];
  $realPath = '/uploads/'.$dir;
  $handle = opendir(dirname(realpath(__FILE__)).$realPath);
    while($file = readdir($handle)){
      if($file !== '.' && $file !== '..'){
        echo '<img src="'.$realPath.'/'.$file.'" border="0" width="200" />';
    }
  }
?>

I have use this code an I get the o/p like this:

<?php
  $dir_id = session_id(md5(uniqid()));
  session_start();
  $path = "uploads/";
  $dir = $path.$dir_id;
  $path = $path.$dir_id."/";
  if (file_exists($dir)) {
      system('/bin/rm -rf ' . escapeshellarg($dir));
  } else {
    mkdir($path);
    chmod($path, 0722);  
  }
  $_SESSION["id"] = $dir_id;
  $_SESSION["directory"] = "/" . $dir;
  $_SESSION["path_name"] = $path;
?>

In any file.php, which u need get session:

<?php
  session_start();

  $realPath = 'uploads/'.$_SESSION['id'];

  $handle = opendir(dirname(realpath(__FILE__)).$realPath;
  while($file = readdir($handle)){
      if($file !== '.' && $file !== '..'){
          echo '<img src="uploads/'.$file.'" border="0" />';
      }
  }
?>

I advice to you read that: http://www.w3schools./php/php_sessions.asp when i was started with php 6 years ago - it was rly helpful

session_start does not take any argument. It's just to put a cookie and to read the session variables. (exposed in $_SESSION). You have to use session_start() on every pages to be able to read the $_SESSION variables.

this will give only image file from directory using session variable.

<?php
  $dir=$_SESSION['id'];
  $realPath = '/uploads/'.$dir;
  $handle = opendir(dirname(realpath(__FILE__)).$realPath);
    while($file = readdir($handle)){
      if($file !== '.' && $file !== '..'){
      if(fnmatch('*.jpg', $file) || fnmatch('*.png', $file) || fnmatch('*.jpeg', $file)){
            echo '<img src="'.$realPath.'/'.$file.'"/>';
         }
    }
  }
?>

本文标签： javascriptimage retrieval from directory and session variable issuesphpStack Overflow