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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 |
---|---|
127 | * Filter the value of the requested user metadata. |
128 | * |
129 | * The filter name is dynamic and depends on the $field parameter of the function. |
130 | * |
131 | * @since 2.8.0 |
132 | * |
133 | * @param string $value The value of the metadata. |
134 | * @param int $user_id The user ID. |
135 | */ |
136 | return apply_filters( 'get_the_author_' . $field, $value, $user_id ); |
137 | } |
138 |
|
139 | /** |
140 | * Retrieve the requested data of the author of the current post. |
141 | * @link http://codex.wordpress.org/Template_Tags/the_author_meta |
142 | * @since 2.8.0 |
143 | * @param string $field selects the field of the users record. |
144 | * @param int $user_id Optional. User ID. |
145 | * @echo string The author's field from the current author's DB object. |