PHP Warning: Undefined array key “extension”

  • Resolved petertely

    (@petertely)


    1 month ago

    Hi,

    “Regenerate all entries” and “Regenerate all entries (optimized)” are not completing. The progress freezes after a certain time.

    Errors in debug.log:

    • PHP Warning: Undefined array key “extension” in /wp-content/plugins/wp-retina-2x/classes/core.php on line 1675
    • PHP Warning: Undefined array key “extension” in /wp-content/plugins/wp-retina-2x/classes/core.php on line 1754
    • PHP Warning: Undefined array key “extension” in /wp-content/plugins/wp-retina-2x/classes/core.php on line 1848

    Environment:

    WordPress 6.6.2
    WooCommerce 9.3.3
    PHP 8.2.24
    max_execution_time : 14400
    memory_limit : 512M
    wp_memory_limit : 256M
    wp_max_memory_limit : 512M

    Bonus question:

    What is the difference between “Regenerate all entries” and “Regenerate all entries (optimized)”? (I couldn’t find the information in the documentation).

    Thank you in advance.

Viewing 2 replies - 1 through 2 (of 2 total)
  • Plugin Support Val Meow

    (@valwa)

    Hey @petertely! ??

    This is a warning message that you can safely ignore. If the process freezes, it likely indicates an error. Check your PHP logs for any fatal errors that might explain which part of the process is failing. If there’s no error, your server might have security rules limiting the number of requests allowed in a given time frame, and bulk regeneration could exceed these limits. To troubleshoot, monitor your network activity during the process to see the server’s response.

    The “Regenerate All Entries” option deletes all thumbnails and recreates them, while the “Optimize” option scans existing thumbnails and only regenerates the necessary ones, making it more efficient for bulk-processing a large number of images.

    Thread Starter petertely

    (@petertely)

    Hi Val Meow,

    Thanks for your response and for explaining the difference between the two options.

    Even if the PHP warning isn’t critical, will it be fixed in an upcoming update? I like to keep my debug.log clean ??

    As for the mass regeneration block, I thought it was due to a low “max_execution_time”. I increased it to 14400, but it didn’t change anything. My host (O2Switch) is known to be reliable in France. During the attempts, I don’t see any errors other than the ones already mentioned.

    Thanks

Viewing 2 replies - 1 through 2 (of 2 total)
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