Fix featured image rename failure on servers with `.tmp` in temp directory path by Copilot · Pull Request #1256 · Codeinwp/feedzy-rss-feeds

Copilot · 2026-06-11T08:17:39Z

try_save_featured_image() used str_replace('.tmp', ...) to swap the downloaded file's .tmp extension for the real MIME extension. On servers where the system temp directory itself contains .tmp in its path (e.g. /usr/home/user/.tmp/), this corrupts the directory segment too — producing a path like /usr/home/user/.jpeg/file.jpeg — causing rename() to fail for every import.

Change

includes/admin/feedzy-rss-feeds-import.php — replace str_replace with an end-anchored preg_replace so only the .tmp file extension is rewritten, and use wp_get_default_extension_for_mime_type() for safer extension derivation that handles all MIME types (not just image/*):

// Before — replaces ALL occurrences of ".tmp" in the full path string
$new_local_file = str_replace( '.tmp', str_replace( 'image/', '.', $type ), $local_file );

// After — replaces only a trailing ".tmp" extension, with a properly derived extension
$extension      = function_exists( 'wp_get_default_extension_for_mime_type' ) ? wp_get_default_extension_for_mime_type( $type ) : '';
$extension      = ! empty( $extension ) ? '.' . $extension : str_replace( 'image/', '.', $type );
$new_local_file = preg_replace( '/\.tmp$/', $extension, $local_file );

Using wp_get_default_extension_for_mime_type() ensures non-image MIME types (e.g. application/pdf) also get a valid file extension, matching the same pattern already used earlier in this method.

…ccurrences

Copilot

Pull request overview

Fixes a featured-image import failure caused by rewriting .tmp anywhere in the downloaded temp file path (including directory segments like /.tmp/) by only rewriting a trailing .tmp extension.

Changes:

Replace the .tmp extension rewrite from str_replace() to an end-anchored preg_replace('/\.tmp$/', ...) in try_save_featured_image(), preventing path corruption when temp directories include .tmp.

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 				// so let's determine the file's mime type and then rename the .tmp file with that extension.
 				if ( in_array( $type, array_values( get_allowed_mime_types() ), true ) ) {
-					$new_local_file = str_replace( '.tmp', str_replace( 'image/', '.', $type ), $local_file );
+					$new_local_file = preg_replace( '/\.tmp$/', str_replace( 'image/', '.', $type ), $local_file );


poonam279 · 2026-06-11T14:51:00Z

@Soare-Robert-Daniel, I'm not sure which solution would be the best one here. Could you please review Copilot's suggestion and confirm whether it looks correct?

Soare-Robert-Daniel · 2026-06-12T07:29:50Z

@claude[agent] evalue the current solution based on the original problem

Description
When importing posts (e.g. from YouTube feeds) with Feedzy, featured images are sometimes not attached, and import logs show repeated errors like:

Could not rename temporary file for: [post title]

Expectation:
Featured images should be saved and attached for imported posts as expected on all systems that support file operations.

Current Behavior:
On certain servers, particularly those where the WordPress temp folder path contains a directory named ".tmp" (e.g., /usr/home/user/.tmp/), the file rename involved in saving an image fails. This is due to a code bug that replaces .tmp anywhere in the full temp file path, causing the function to attempt a rename the parent directory (which doesn't exist), instead of only replacing the file extension. On environments where the temp directory is /tmp/, the bug does not occur and image saving works fine.

Related code: includes/admin/feedzy-rss-feeds-import.php::try_save_featured_image()

See explanation and fix below.

Step-by-step reproduction instructions
Set up Feedzy on a server or container where PHP's temp directory (sys_get_temp_dir()) uses a parent folder named .tmp (for example, /usr/home/USERNAME/.tmp/).

Configure an import job that pulls posts with images (e.g., a YouTube feed).

Run the import job.

Observe that imported posts are missing featured images and the error log contains repeated entries:

Could not rename temporary file for: [post title]

If moving to a different server with /tmp/ as the temp directory (no dot-prefix), the import works as expected.

Screenshots, screen recording, code snippet or Help Scout ticket
Error screenshot with logs and JSON context:

Feedzy featured image rename error screenshot
Code snippet causing the problem:
in includes/admin/feedzy-rss-feeds-import.php:

// Before (buggy)
$new_local_file = str_replace('.tmp', str_replace('image/', '.', $type), $local_file);
// After (fixed)
$new_local_file = preg_replace('/\.tmp$/', str_replace('image/', '.', $type), $local_file);
See also: error message context, code references, and changelog notes about related improvements.

…vation Agent-Logs-Url: https://github.com/Codeinwp/feedzy-rss-feeds/sessions/c9e20d0d-b601-4ecc-84ef-267703743c41 Co-authored-by: Soare-Robert-Daniel <17597852+Soare-Robert-Daniel@users.noreply.github.com>

Claude · 2026-06-12T07:33:49Z

@claude[agent] evalue the current solution based on the original problem

...

The current solution correctly addresses the original problem. The fix has two parts:

preg_replace('/\.tmp$/', ...) — end-anchored regex ensures only the trailing .tmp file extension is replaced, never a .tmp directory component in the path (e.g., /usr/home/user/.tmp/file.tmp → only the last .tmp is replaced).
wp_get_default_extension_for_mime_type() — addresses the reviewer's concern about non-image MIME types. Instead of relying solely on str_replace('image/', '.', $type) which only works for image/* types, we use the WordPress API to derive the correct extension for any allowed MIME type. This matches the same pattern already used at lines 3159-3160 in this method.

The str_replace('image/', '.', $type) is kept only as a fallback for defensive compatibility, but in practice it won't be reached since wp_get_default_extension_for_mime_type() handles all types registered via get_allowed_mime_types().

See commit 361f006.

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pirate-bot · 2026-06-12T19:16:46Z

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Copilot AI assigned Copilot and poonam279 Jun 11, 2026

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Copilot AI linked an issue Jun 11, 2026 that may be closed by this pull request

Cannot rename temporary file for featured image: bug in try_save_featured_image() affects certain server paths #1255

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Fix: use preg_replace to only replace .tmp file extension, not path o…

2a44721

…ccurrences

Copilot AI changed the title ~~[WIP] Fix bug in try_save_featured_image affecting temporary file renaming~~ Fix featured image rename failure on servers with .tmp in temp directory path Jun 11, 2026

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Use wp_get_default_extension_for_mime_type() for safer extension deri…

361f006

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Fix featured image rename failure on servers with `.tmp` in temp directory path#1256

Fix featured image rename failure on servers with `.tmp` in temp directory path#1256
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