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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 |
|---|---|
| 514 | * |
| 515 | * @param null|mixed $null Whether to preempt output of the resize dimensions. |
| 516 | * @param int $orig_w Original width in pixels. |
| 517 | * @param int $orig_h Original height in pixels. |
| 518 | * @param int $dest_w New width in pixels. |
| 519 | * @param int $dest_h New height in pixels. |
| 520 | * @param bool|array $crop Whether to crop image to specified width and height or resize. |
| 521 | * An array can specify positioning of the crop area. Default false. |
| 522 | */ |
| 523 | $output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop ); |
| 524 | if ( null !== $output ) |
| 525 | return $output; |
| 526 | |
| 527 | if ( $crop ) { |
| 528 | // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h |
| 529 | $aspect_ratio = $orig_w / $orig_h; |
| 530 | $new_w = min($dest_w, $orig_w); |
| 531 | $new_h = min($dest_h, $orig_h); |
| 532 | |