CODEWITHSUNDEEP
phpwordpressfile-exists
theflyingant
theflyingant

Reputation: 33

use file_exists() to check wordpress uploads folder

I have created a directory in Wordpress uploads folder for end user to bulk upload photos via ftp. Images are numbered 1.jpg, 2.jpg... etc. I've generated the image urls successfully, but now I want to test for empty urls - i.e. if "8.jpg" doesn't exist, show a placeholder image from the theme's images folder instead.

I'm trying to use file_exists(), but this returns false every time and always displays the placeholder image. Any suggestions would be appreciated.

<?php while ( have_posts() ) : the_post();
    // create url to image in wordpress 'uploads/catalogue_images/$sale' folder
    $upload_dir = wp_upload_dir();                          
    $sub_dir = $wp_query->queried_object;
    $image = get_field('file_number');
    $image_url = $upload_dir['baseurl'] . "/catalogue_images/" . $sub_dir->name . "/" . $image . ".JPG"; ?>

    <?php if(file_exists($image_url)){
        echo '<img src="' . $image_url . '" alt="" />';
    } else {
        //placeholder
        echo '<img src="' . get_bloginfo("template_url") . '/images/photo_unavailable.jpg" alt="" />';
    } ?>                                
<?php endwhile; ?>

Upvotes: 2

Views: 8513

Answers (2)

sjagr
sjagr

Reputation: 16502

The PHP file_exists function mainly expects an internal server path to the file to be tested. This is made obvious with the example.

Fortunately, we see that wp_upload_dir() gives us several useful values:

  • 'path' - base directory and sub directory or full path to upload directory.
  • 'url' - base url and sub directory or absolute URL to upload directory.
  • 'subdir' - sub directory if uploads use year/month folders option is on.
  • 'basedir' - path without subdir.
  • 'baseurl' - URL path without subdir.
  • 'error' - set to false.

I've bolded what we want to use. Using these two values, you have to generate two variables, one for the external URL and one for the internal file path:

$image_relative_path = "/catalogue_images/" . $sub_dir->name . "/" . $image . ".JPG";
$image_path = $upload_dir['basedir'] . $image_relative_path;
$image_url = $upload_dir['baseurl'] . $image_relative_path;

Then use file_exists($image_path) instead of file_exists($image_url).

Note

As with the PHP notes on PHP >= 5.0.0, you can indeed use file_exists with some URLs, however the http:// protocol is not supported for the stat() function (which is what file_exists uses.)

Upvotes: 7

secelite
secelite

Reputation: 1373

You have to use an internal path for checking if a file exists. So use $upload_dir['path'] instead $upload_dir['baseurl']

[path] - base directory and sub directory or full path to upload directory.

http://codex.wordpress.org/Function_Reference/wp_upload_dir

Upvotes: 1

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