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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 |
---|---|
181 | * Filters the escaped Global Unique Identifier (guid) of the post. |
182 | * |
183 | * @since 4.2.0 |
184 | * |
185 | * @see get_the_guid() |
186 | * |
187 | * @param string $guid Escaped Global Unique Identifier (guid) of the post. |
188 | * @param int $id The post ID. |
189 | */ |
190 | echo apply_filters( 'the_guid', $guid, $id ); |
191 | } |
192 |
|
193 | /** |
194 | * Retrieve the Post Global Unique Identifier (guid). |
195 | * |
196 | * The guid will appear to be a link, but should not be used as an link to the |
197 | * post. The reason you should not use it as a link, is because of moving the |
198 | * blog across domains. |
199 | * |