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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 |
|---|---|
| 222 | * |
| 223 | * Only applies to posts with post_type of 'post'. |
| 224 | * |
| 225 | * @since 1.5.0 |
| 226 | * |
| 227 | * @param string $permalink The post's permalink. |
| 228 | * @param WP_Post $post The post in question. |
| 229 | * @param bool $leavename Whether to keep the post name. |
| 230 | */ |
| 231 | return apply_filters( 'post_link', $permalink, $post, $leavename ); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Retrieve the permalink for a post with a custom post type. |
| 236 | * |
| 237 | * @since 3.0.0 |
| 238 | * |
| 239 | * @param int $id Optional. Post ID. |
| 240 | * @param bool $leavename Optional, defaults to false. Whether to keep post name. |