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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 |
|---|---|
| 972 | * This filter does not currently allow for page templates to be added. |
| 973 | * |
| 974 | * @since 3.9.0 |
| 975 | * |
| 976 | * @param array $page_templates Array of page templates. Keys are filenames, |
| 977 | * values are translated names. |
| 978 | * @param WP_Theme $this The theme object. |
| 979 | * @param WP_Post|null $post The post being edited, provided for context, or null. |
| 980 | */ |
| 981 | $return = apply_filters( 'theme_page_templates', $page_templates, $this, $post ); |
| 982 | |
| 983 | return array_intersect_assoc( $return, $page_templates ); |
| 984 | } |
| 985 | |
| 986 | /** |
| 987 | * Scans a directory for files of a certain extension. |
| 988 | * |
| 989 | * @since 3.4.0 |
| 990 | * @access private |