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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 |
|---|---|
| 962 | * |
| 963 | * Some examples of filter hooks generated here include: 'edit_attachment_per_page', |
| 964 | * 'edit_post_per_page', 'edit_page_per_page', etc. |
| 965 | * |
| 966 | * @since 3.0.0 |
| 967 | * |
| 968 | * @param int $posts_per_page Number of posts to display per page for the given 'per_page' |
| 969 | * type. Default 20. |
| 970 | */ |
| 971 | $posts_per_page = apply_filters( $per_page, $posts_per_page ); |
| 972 | |
| 973 | /** |
| 974 | * Filter the number of posts displayed per page when specifically listing "posts". |
| 975 | * |
| 976 | * @since 2.8.0 |
| 977 | * |
| 978 | * @param int $per_page Number of posts to be displayed. Default 20. |
| 979 | * @param string $post_type The post type. |
| 980 | */ |