select and display an image from a dropdown menu

Matteo Sala :

I have a php code that has a dropdown menu filled with the names of images files in a specific folder, what i want is once the user select one of the names the selected image is displayed, at the moment i'm trying to use a submit button. i am trying to not use jquery or other languages

   <?php


$folder = 'C:\Users\source\\';

  echo '<form action="" method="post">'."\n".'<select name="image">'."\n".
 dropdown(image_filenames($folder), @$_POST['image']).
 '</select>'."\n".'<input type="submit" name="submit">'."\n".'
 </form>';
function image_filenames($dir)
{
  $handle = @opendir($dir)
    or die("I cannot open the directory '<b>$dir</b>' for reading.");
$images = array();
while (false !== ($file = readdir($handle)))
{
    if (preg_match('/^.*\.(jpg|jpeg|png|gif|svg)$/', $file))
    {
        $images[] = $file;
    }
}
closedir($handle);
return $images;
}
function dropdown($options_array, $selected = null)
{
$return = null;
foreach($options_array as $option)
{
    $return .= '<option value="'.$option.'"'.
               (($option == $selected) ? ' selected="selected"' : null ).
               '>'.$option.'</option>'."\n";
}
return $return;
}


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

echo '<img src=C:\Users\source'. $row['images'] . ' />';



}
   ?>

Antony Jack :

You must need to keep your file inside your project ...

change

$folder = 'C:\Users\source\\';

$folder = 'images\\';

images is the folder name which inside your project...

xampp or wampp not consider the local path files...

And it won't display the images as well...

Hope this Helpful...

I have changed two places in your code...

 <?php


    $folder = 'images\\'; // changed here

      echo '<form action="" method="post">'."\n".'<select name="image">'."\n".
     dropdown(image_filenames($folder), @$_POST['image']).
     '</select>'."\n".'<input type="submit" name="submit">'."\n".'
     </form>';
    function image_filenames($dir)
    {
      $handle = @opendir($dir)
        or die("I cannot open the directory '<b>$dir</b>' for reading.");
    $images = array();
    while (false !== ($file = readdir($handle)))
    {
        if (preg_match('/^.*\.(jpg|jpeg|png|gif|svg)$/', $file))
        {
            $images[] = $file;
        }
    }
    closedir($handle);
    return $images;
    }
    function dropdown($options_array, $selected = null)
    {
    $return = null;
    foreach($options_array as $option)
    {
        $return .= '<option value="'.$option.'"'.
                   (($option == $selected) ? ' selected="selected"' : null ).
                   '>'.$option.'</option>'."\n";
    }
    return $return;
    }


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

    echo '<img src=images\\'. $_POST['image'] . ' />';  // changed here



    }
       ?>