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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 |
|---|---|
| 156 | |
| 157 | /** |
| 158 | * Filters the post title. |
| 159 | * |
| 160 | * @since 0.71 |
| 161 | * |
| 162 | * @param string $title The post title. |
| 163 | * @param int $id The post ID. |
| 164 | */ |
| 165 | return apply_filters( 'the_title', $title, $id ); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Display the Post Global Unique Identifier (guid). |
| 170 | * |
| 171 | * The guid will appear to be a link, but should not be used as a link to the |
| 172 | * post. The reason you should not use it as a link, is because of moving the |
| 173 | * blog across domains. |
| 174 | * |