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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 |
|---|---|
| 981 | |
| 982 | /** |
| 983 | * Filters whether the current image is displayable in the browser. |
| 984 | * |
| 985 | * @since 2.5.0 |
| 986 | * |
| 987 | * @param bool $result Whether the image can be displayed. Default true. |
| 988 | * @param string $path Path to the image. |
| 989 | */ |
| 990 | return apply_filters( 'file_is_displayable_image', $result, $path ); |
| 991 | } |
| 992 | |
| 993 | /** |
| 994 | * Load an image resource for editing. |
| 995 | * |
| 996 | * @since 2.9.0 |
| 997 | * |
| 998 | * @param int $attachment_id Attachment ID. |
| 999 | * @param string $mime_type Image mime type. |