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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 |
|---|---|
| 33 | * |
| 34 | * The dynamic portion of the hook name, `$type`, refers to the filename -- minus the file |
| 35 | * extension and any non-alphanumeric characters delimiting words -- of the file to load. |
| 36 | * This hook also applies to various types of files loaded as part of the Template Hierarchy. |
| 37 | * |
| 38 | * @since 1.5.0 |
| 39 | * |
| 40 | * @param string $template Path to the template. See locate_template(). |
| 41 | */ |
| 42 | return apply_filters( "{$type}_template", $template ); |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Retrieve path of index template in current or parent template. |
| 47 | * |
| 48 | * The template path is filterable via the dynamic {@see '$type_template'} hook, |
| 49 | * e.g. 'index_template'. |
| 50 | * |
| 51 | * @since 3.0.0 |