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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 |
|---|---|
| 414 | |
| 415 | /** |
| 416 | * Filters the `$orientation` value to correct it before rotating or to prevemnt rotating the image. |
| 417 | * |
| 418 | * @since 5.3.0 |
| 419 | * |
| 420 | * @param int $orientation EXIF Orientation value as retrieved from the image file. |
| 421 | * @param string $file Path to the image file. |
| 422 | */ |
| 423 | $orientation = apply_filters( 'wp_image_maybe_exif_rotate', $orientation, $this->file ); |
| 424 | |
| 425 | if ( ! $orientation || 1 === $orientation ) { |
| 426 | return false; |
| 427 | } |
| 428 | |
| 429 | switch ( $orientation ) { |
| 430 | case 2: |
| 431 | // Flip horizontally. |
| 432 | $result = $this->flip( true, false ); |