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② 後台搜尋「Incod Image Dimension Manager」→ 直接安裝（推薦）
原文外掛簡介
Incod Image Dimension Manager unifies every image on your site to fixed dimensions, ensuring a consistent look on every page, archive and gallery.
Incod Image Dimension Manager is an original plugin developed, owned and maintained by inCOD (ideagrafica). “Incod” is the author’s own brand: the plugin has no affiliation with, endorsement from, or connection to any other company or project of a similar name.
Key features
Three resize modes: Letterbox / Canvas, Hard Crop with a focal point and Proportional Scale.
Customizable HEX fill canvas (color picker) or transparent (PNG/WebP), always centered.
Dynamic detection of all public Custom Post Types, WooCommerce included, with multiple selection.
Auto-resize on upload: new images are fitted automatically when uploaded.
Asynchronous Bulk Resize via AJAX: configurable batches, progress bar, percentage, counters, elapsed time and remaining-time estimate.
Timeout protection: time budget per request, adaptive throttle between batches and a mutual-exclusion lock: the server is never saturated.
Pause, Resume and Cancel at any moment, with no limit on the number of images.
Optional backup of the originals with batched, progressive restore.
Imagick engine with automatic GD fallback through wp_get_image_editor().
Complete security: capabilities, nonces, sanitization and escaping on every input and output.
Translatable: text domain incod-image-dimension-manager and a .pot file in the /languages folder.
Resize modes
Letterbox / Canvas Padding — fits the image inside the target dimensions without cropping and fills the empty space with a customizable (HEX color picker) or transparent canvas (PNG and WebP), with automatic centering.
Hard Crop — crops the image to fill the target dimensions completely, with a selectable focal point (Center, Top, Bottom, Left, Right).
Proportional Scale — scales the image proportionally without adding a canvas and without destructive cropping.
Option to prevent upscaling of images smaller than the target.
JPEG quality configurable from 1 to 100.
Images that already match the target are skipped automatically, without rewriting the file.
Custom Post Types
Dynamic detection of every registered public Custom Post Type (WooCommerce Products, posts, pages, portfolios, custom CPTs).
Multiple selection through checkboxes in the settings panel.
Support for Featured Images, child attachments, WooCommerce product galleries (_product_image_gallery) and product variation images.
Explicit choice between the whole Media Library and only the images used by the selected post types.
Automation and bulk processing
Auto-resize on upload: new images are resized automatically when uploaded (hook wp_generate_attachment_metadata), with a recursion guard.
Asynchronous Bulk Resize: batch processing via AJAX with a smooth progress bar, percentage, counters, elapsed time and remaining-time estimate.
Configurable batches of 1 to 50 images per request, with no limit on the total number of images.
Timeout protection: every request works within a dedicated time budget; images not yet processed are deferred to the next request without losses or errors.
Adaptive throttle: the pause between batches adapts to the load just processed, so the server is never saturated.
Mutual-exclusion lock: only one processing session at a time, even with multiple tabs open.
Pause, Resume and Cancel, with an error log (last 50 entries) and a stored, retrievable session state.
PHP timeout and memory-limit increase applied only to the heavy AJAX requests that need it (queue, batch, restore); light requests and the rest of the site are never affected.
Optional backup of the original files with batched restore (up to 25 folders or a time budget per request).
Security and standards
current_user_can( 'manage_options' ) checks on every screen and AJAX endpoint.
CSRF protection with a nonce on every request.
Input sanitization and systematic output escaping.
PHP namespace and modular class architecture.
Processing through wp_get_image_editor(): uses Imagick when available, with automatic GD fallback.
uninstall.php for a clean removal of options, transients and backup folders.
Requirements and compatibility
WordPress 5.0 or newer (tested up to 7.1).
PHP 7.4 or newer.
Imagick or GD (at least one of them, almost always already present).
No external dependencies or third-party services.
