# Show File Type and Size on Document Links

> Adds the file type and size, such as "(PDF, 2.4 MB)", after links to PDF, Word, Excel and PowerPoint files in your content, so visitors know what they are about to download.

- Type: PHP
- Runs: Frontend only
- Category: [Accessibility](https://wpide.com/library/category/accessibility/)
- Tags: links, pdf, downloads
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/a11y-document-link-info/

## Code

```php
// Extensions to label, with the name shown to visitors.
$wpide_doc_types = array(
    'pdf'  => 'PDF',
    'doc'  => 'Word',
    'docx' => 'Word',
    'xls'  => 'Excel',
    'xlsx' => 'Excel',
    'ppt'  => 'PowerPoint',
    'pptx' => 'PowerPoint',
    'zip'  => 'ZIP',
);

add_filter( 'the_content', function ( $content ) use ( $wpide_doc_types ) {
    $pattern = '#<a\b([^>]*\bhref=["\']([^"\']+\.(' . implode( '|', array_keys( $wpide_doc_types ) ) . '))(?:\?[^"\']*)?["\'][^>]*)>(.*?)</a>#is';

    if ( ! preg_match( '#\.(' . implode( '|', array_keys( $wpide_doc_types ) ) . ')\b#i', $content ) ) {
        return $content;
    }

    $uploads = wp_get_upload_dir();

    return preg_replace_callback( $pattern, function ( $m ) use ( $wpide_doc_types, $uploads ) {
        if ( false !== strpos( $m[4], 'wpide-file-info' ) ) {
            return $m[0];
        }

        $type = $wpide_doc_types[ strtolower( $m[3] ) ];
        $info = $type;
        $url  = set_url_scheme( $m[2], 'https' );
        $base = set_url_scheme( $uploads['baseurl'], 'https' );

        if ( 0 === strpos( $url, $base ) ) {
            $path = $uploads['basedir'] . substr( $url, strlen( $base ) );
            if ( false === strpos( $path, '..' ) && is_readable( $path ) ) {
                $info .= ', ' . size_format( filesize( $path ), 1 );
            }
        }

        return '<a' . $m[1] . '>' . $m[4] . ' <span class="wpide-file-info">(' . esc_html( $info ) . ')</span></a>';
    }, $content );
}, 20 );
```

## Notes

The size is only shown for files stored in your uploads folder; links to other sites get the file type only.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Show File Type and Size on Document Links" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/