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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 |
|---|---|
| 549 | |
| 550 | /** |
| 551 | * Filters whether the current image is displayable in the browser. |
| 552 | * |
| 553 | * @since 2.5.0 |
| 554 | * |
| 555 | * @param bool $result Whether the image can be displayed. Default true. |
| 556 | * @param string $path Path to the image. |
| 557 | */ |
| 558 | return apply_filters( 'file_is_displayable_image', $result, $path ); |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * Load an image resource for editing. |
| 563 | * |
| 564 | * @since 2.9.0 |
| 565 | * |
| 566 | * @param string $attachment_id Attachment ID. |
| 567 | * @param string $mime_type Image mime type. |