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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 |
|---|---|
| 870 | |
| 871 | /** |
| 872 | * Filters the list of intermediate image sizes. |
| 873 | * |
| 874 | * @since 2.5.0 |
| 875 | * |
| 876 | * @param string[] $default_sizes An array of intermediate image size names. Defaults |
| 877 | * are 'thumbnail', 'medium', 'medium_large', 'large'. |
| 878 | */ |
| 879 | return apply_filters( 'intermediate_image_sizes', $default_sizes ); |
| 880 | } |
| 881 | |
| 882 | /** |
| 883 | * Returns a normalized list of all currently registered image sub-sizes. |
| 884 | * |
| 885 | * @since 5.3.0 |
| 886 | * @uses wp_get_additional_image_sizes() |
| 887 | * @uses get_intermediate_image_sizes() |
| 888 | * |