Can’t read images in from directory using PHP

@rwilliams1961Feb 18.2013

I’ve spent a day and a half attempting to read images from a folder and then printing them to a webpage. I have used code provided at a few different reputable websites. They have not worked.

I’ve used glob, opendir, and scandir to read the folders.

What I am seeing:

1. The user drops through the loop once.

2. The variable used for the image does not print a value.

My belief is that the code is not in any of these instances seeing an image. That has led me to think that I am pointing to the wrong folder. This is a WordPress install located in a subdirectory: ~~[url]~~http://domainname/subdirectory/wordpressinstall/wp-content/uploads[/url]. The images are in the uploads folder.

The directory path I have used is $dir = /trophy/wp-content/uploads.

Any and all help is appreciated.

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PHP

15 Comments(s) _↴

@rwilliams1961authorFeb 18.2013 — #Anyone?

@gvreFeb 18.2013 — #Could you post your code and the path of the script?

@rwilliams1961authorFeb 18.2013 — #$current_dir = 'domainname/trophy/wp-content/uploads/';

echo $current_dir;

$dir = opendir($current_dir);

while ($file = readdir($dir))

{

$parts = explode(".", $file);

if (is_array($parts) && count($parts) > 1)

{

$extension = end($parts);

if ($extension == "ext")

{

echo 'hello';

}

}

closedir($dir);

@rwilliams1961authorFeb 18.2013 — #This is another version:

$dir = '/trophy/wp-content/uploads';
  $scan = scandir($dir); 
  for ($i=0; $i<count($scan); $i++) 
   {
   echo '<img src="'.$dir.'/'.$scan[$i].'">';
   echo '<p>'.$scan[$i]; 
   if (strpos($scan[$i], 'cat') !== false)
   { 
   echo '<div id="#catalog-directory-images">';
   echo '<img src="'.$page_url.$dir.$scan[$i].'" alt="'.$scan[$i].'" />';
   echo '</div>';
   } 
   }

@gvreFeb 18.2013 — #

[code=php]function GetImages($dir, array $extensions, $prefix = "")
 {
 $images = array();
 $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS));
 while($it->valid())
 {
 if (($pos = strrpos($it->getSubPathName(), '.')) !== false &&
 in_array(substr($it->getSubPathName(), $pos + 1), $extensions))
 {
 if ($prefix)
 $prefix = rtrim($prefix, '/') . '/';
 $images[] = $prefix . $it->getSubPathName();
 }
 $it->next();
 }
 return $images;
 }
 
 $dir = dirname(__FILE__) . '/wp-content/uploads';
 $extensions = array('jpg', 'png', 'gif');
 $prefix = '/wp-content/uploads';
 $images = GetImages($dir, $extensions, $prefix);
 [/code]

I assume that the script's path is the root dir of wordpress. If not, you should change $dir and $prefix.

@rwilliams1961authorFeb 18.2013 — #So I plugged it in exactly as you sent it EXCEPT that I added the subdirectory that the WordPress install is in, so the directory and prefix paths are /trophy/wp-content/uploads.

The result is that when I publish the page, the HTML ends at on the line previous to your code. It's all white from just before "<?php"

Any ideas?

@gvreFeb 18.2013 — #You don't need to change the $dir and $prefix if the script is inside the wordpress root dir. The $images contains an array with all images' paths. You should add a foreach construct to iterate over it.

e.g.

[code=php]foreach($images as $img)
 {
 echo '<img src="' . $img . '" /><br />';
 }[/code]

@rwilliams1961authorFeb 18.2013 — #Okay, I'll plug that in. Thank you.

Still, why did the HTML stop when it hit the code - not even my footer?

@gvreFeb 18.2013 — #Did you wrap the code in <?php ?> tags?

@rwilliams1961authorFeb 18.2013 — #Yes:

<?php

function GetImages($dir, array $extensions, $prefix = "")

{

$images = array();

$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS));

while($it->valid())

{

if (($pos = strrpos($it->getSubPathName(), '.')) !== false &&

in_array(substr($it->getSubPathName(), $pos + 1), $extensions))

{

if ($prefix)

$prefix = rtrim($prefix, '/') . '/';

$images[] = $prefix . $it->getSubPathName();

 }
   $it->next();
 
 
 
 
   }
   return $images;

foreach($images as $img)

{

echo '<img src="' . $img . '" /><br />';

}

}

$dir = dirname(__FILE__) . '/wp-content/uploads';

$extensions = array('jpg', 'png', 'gif');

$prefix = '/wp-content/uploads';

$images = GetImages($dir, $extensions, $prefix);

?>

@gvreFeb 18.2013 — #RecursiveDirectoryIterator throws an UnexpectedValueException if the path cannot be found or is not a directory. I suppose that the dir was not found when you added /trophy. Try this

[code=php]function GetImages($dir, array $extensions, $prefix = "")
 {
 $images = array();
 $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS));
 while($it->valid())
 {
 if (($pos = strrpos($it->getSubPathName(), '.')) !== false &&
 in_array(substr($it->getSubPathName(), $pos + 1), $extensions))
 {
 if ($prefix)
 $prefix = rtrim($prefix, '/') . '/';
 $images[] = $prefix . $it->getSubPathName();
 }
 $it->next();
 }
 return $images;
 }
 
 $dir = dirname(__FILE__) . '/wp-content/uploads';
 $extensions = array('jpg', 'png', 'gif');
 $prefix = '/wp-content/uploads';
 try {
 $images = GetImages($dir, $extensions, $prefix);
 foreach($images as $img)
 echo '<img src="' . $img . '" /><br />';
 } catch (UnexpectedValueException $e) {
 die($e->getMessage());
 }[/code]

ps. You put foreach after the return statement, so it could not be executed.

@rwilliams1961authorFeb 18.2013 — #I put this into my page, still only white where this code begins.

This is the code from the last line to print to the footer:



<?php

function GetImages($dir, array $extensions, $prefix = "")

{

$images = array();

$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS));

while($it->valid())

{

if (($pos = strrpos($it->getSubPathName(), '.')) !== false &&

in_array(substr($it->getSubPathName(), $pos + 1), $extensions))

{

if ($prefix)

$prefix = rtrim($prefix, '/') . '/';

$images[] = $prefix . $it->getSubPathName();

}

$it->next();

}

return $images;

}

$dir = dirname(__FILE__) . '/wp-content/uploads';

$extensions = array('jpg', 'png', 'gif');

$prefix = '/wp-content/uploads';

try {

$images = GetImages($dir, $extensions, $prefix);

foreach($images as $img)

echo '<img src="' . $img . '" /><br />';

} catch (UnexpectedValueException $e) {

die($e->getMessage());

}

?>

</div>

</div>

<?php endwhile; ?>

<?php get_footer(''); ?>

@gvreFeb 18.2013 — #You should check the log files for error messages.

Btw, I made some small changes to the code.

[code=php]function GetImages($dir, array $extensions, $prefix = '')
 {
 $images = array();
 $it = new RecursiveIteratorIterator
 (
 new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS | FilesystemIterator::UNIX_PATHS),
 RecursiveIteratorIterator::LEAVES_ONLY,
 RecursiveIteratorIterator::CATCH_GET_CHILD
 );
 while($it->valid())
 {
 if (($pos = strrpos($it->getSubPathName(), '.')) !== false &&
 in_array(substr($it->getSubPathName(), $pos + 1), $extensions))
 {
 if ($prefix)
 $prefix = rtrim($prefix, '/') . '/';
 $images[] = $prefix . $it->getSubPathName();
 }
 $it->next();
 }
 return $images;
 }
 
 $dir = dirname(__FILE__) . '/wp-content/uploads';
 $extensions = array('jpg', 'png', 'gif');
 $prefix = '/wp-content/uploads';
 try {
 $images = GetImages($dir, $extensions, $prefix);
 foreach($images as $img)
 echo '<img src="' . $img . '" /><br />' . "n";
 } catch (UnexpectedValueException $e) {
 die($e->getMessage());
 }[/code]

@rwilliams1961authorFeb 18.2013 — #I'm running PHP 5.2, and iterator was introduced in 5.3. Won't work.

@gvreFeb 19.2013 — #Try this (not very well-tested) code.

[code=php]function GetImages($dir, $basedir = null, array $extensions, $recursive = true)
 {
 $dir = rtrim($dir, '/') . '/';
 $images = array();
 
   if (is_dir($dir) && ($dh = @opendir($dir)))
   {
   while (($file = readdir($dh)) !== false)
   {
   if ($file == '.' || $file == '..')
   continue;
 
   if ($recursive)
   {
   if (is_dir($dir . $file))
   {
   $nf = GetImages($dir . $file, $basedir, $extensions, $recursive);
   if (count($nf))
   $images = array_merge($images, $nf);
   }
   else
   {
   if (($pos = strrpos($file, '.')) !== false)
   {
   $ext = substr($file, $pos+1);
   if (in_array($ext, $extensions))
   {
   if ($basedir !== null)
   $images[] = str_replace($basedir, '', $dir . $file);
   else
   $images[] = $dir . $file;
   }
   }
   }
   }
   else
   {
   if (($pos = strrpos($file, '.')) !== false)
   {
   $ext = substr($file, $pos + 1);
   if (in_array($ext, $extensions))
   {
   if ($basedir !== null)
   $images[] = str_replace($basedir, '', $dir . $file);
   else
   $images[] = $dir . $file;
   }
   }
   }
   }
   closedir($dh);
   }
   return $images;
 }
 
 $basedir = dirname(__FILE__);
 $dir = $basedir . '/wp-content/uploads';
 $extensions = array('jpg', 'png', 'gif');
 $images = GetImages($dir, $basedir, $extensions);
 foreach($images as $img)
 echo '<img src="' . $img . '" /><br />';[/code]

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