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Name

Disable and Delete Image Sizes Generated by WordPress

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This WordPress code snippet optimizes image handling by disabling automatic generation of various image sizes during uploads and removing existing generated sizes, thereby enhancing site performance and reducing unnecessary storage usage.

Language

PHP

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Voted: 0 by 0 user(s)

How to Setup Snippet

I/ Using Theme's functions.php File 1. Log in to your WordPress admin. Go to "Appearance" -> "Theme Editor." 2. Find and select the functions.php file. 3. Scroll to the bottom and paste the code. 4. Click "Update File" to save. II/ Using a code snippet plugin 1. Install and activate your preferred plugin. 2. Find the plugin in the WordPress dashboard. 3. Create a new snippet. Paste the code and save. 4. Activate the snippet to enable the functionality. Remember to test changes on a staging site or backup before applying on a live site.

Codevault

laurentf

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Wordpress Compatability

The author has indicated that this snippet is compatable up to wordpress version: 6.1

Our AI bot has checked this snippet is compatable up to wordpress version: 6.1

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History

Last modified:

02/12/2023

Important Note

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AI Bot Comments:

Potential vulnerability found : File Inclusion / Path Traversal
Found on line : -1
Code : file(= $upload_dir['basedir'] . '/' . $path['dirname'] . '/' . $size_data['file'])
Vulnerable line : 20
Code : $path = pathinfo($meta['file']));

Potential vulnerability found : File Inclusion / Path Traversal
Found on line : 37
Code : file($intermediate_file)
Vulnerable line : 30
Code : $intermediate_file = $upload_dir['basedir'] . '/' . $path['dirname'] . '/' . $size_data['file']);

Found 2 vulnerabilities

Disable and Delete Image Sizes Generated by WordPress

 
                    
 1// Disable automatic generation of different image sizes
 2function disable_generated_image_sizes($sizes, $attachment_id) {
 3    // Delete all automatically generated image sizes for an attachment
 4    delete_generated_image_sizes($attachment_id);
 5 
 6    // Remove all automatically generated image sizes during upload
 7    return array();
 8}
 9add_filter('intermediate_image_sizes_advanced', 'disable_generated_image_sizes', 10, 2);
10 
11// Define a function to delete generated image sizes for an attachment
12function delete_generated_image_sizes($attachment_id) {
13    // Get metadata for the attachment
14    $meta = wp_get_attachment_metadata($attachment_id);
15 
16    // Get upload directory information
17    $upload_dir = wp_upload_dir();
18 
19    // Get path information for the original file
20    $path = pathinfo($meta['file']);
21 
22    // Check if the dirname is outside the upload directory
23    if (strpos($path['dirname'], $upload_dir['basedir']) !== 0) {
24        return; // Stop execution if the dirname is outside the upload directory
25    }
26 
27    // Loop through each generated size of the image
28    foreach ($meta['sizes'] as $size => $size_data) {
29        // Construct the path to the generated size file
30        $intermediate_file = $upload_dir['basedir'] . '/' . $path['dirname'] . '/' . $size_data['file'];
31 
32        // Skip if the intermediate file is outside the upload directory
33        if (strpos($intermediate_file, $upload_dir['basedir']) !== 0) {
34            continue; // Skip if the intermediate file is outside the upload directory
35        }
36 
37        // Delete the intermediate file
38        wp_delete_file($intermediate_file);
39    }
40}
41 
42// Hook the function to the 'delete_attachment' action in WordPress
43add_action('delete_attachment', 'delete_generated_image_sizes');

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