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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 340 | function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) { |
| 341 | |
| 342 | if ($orig_w <= 0 || $orig_h <= 0) |
| 343 | return false; |
| 344 | // at least one of dest_w or dest_h must be specific |
| 345 | if ($dest_w <= 0 && $dest_h <= 0) |
| 346 | return false; |
| 347 | |
| 348 | // plugins can use this to provide custom resize dimensions |
| 349 | $output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop ); |
| 350 | if ( null !== $output ) |
| 351 | return $output; |
| 352 | |
| 353 | if ( $crop ) { |
| 354 | // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h |
| 355 | $aspect_ratio = $orig_w / $orig_h; |
| 356 | $new_w = min($dest_w, $orig_w); |
| 357 | $new_h = min($dest_h, $orig_h); |
| 358 | |