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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 |
|---|---|
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Filter the array of categories to return for a post. |
| 91 | * |
| 92 | * @since 3.1.0 |
| 93 | * |
| 94 | * @param array $categories An array of categories to return for the post. |
| 95 | */ |
| 96 | return apply_filters( 'get_the_categories', $categories ); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Sort categories by name. |
| 101 | * |
| 102 | * Used by usort() as a callback, should not be used directly. Can actually be |
| 103 | * used to sort any term object. |
| 104 | * |
| 105 | * @since 2.3.0 |