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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 |
|---|---|
| 486 | * |
| 487 | * @param null|mixed $null Whether to preempt output of the resize dimensions. |
| 488 | * @param int $orig_w Original width in pixels. |
| 489 | * @param int $orig_h Original height in pixels. |
| 490 | * @param int $dest_w New width in pixels. |
| 491 | * @param int $dest_h New height in pixels. |
| 492 | * @param bool|array $crop Whether to crop image to specified width and height or resize. |
| 493 | * An array can specify positioning of the crop area. Default false. |
| 494 | */ |
| 495 | $output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop ); |
| 496 | if ( null !== $output ) |
| 497 | return $output; |
| 498 | |
| 499 | if ( $crop ) { |
| 500 | // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h |
| 501 | $aspect_ratio = $orig_w / $orig_h; |
| 502 | $new_w = min($dest_w, $orig_w); |
| 503 | $new_h = min($dest_h, $orig_h); |
| 504 | |