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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 |
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2286 | $nickname = empty( $userdata['nickname'] ) ? $user_login : $userdata['nickname']; |
2287 |
|
2288 | /** |
2289 | * Filters a user's nickname before the user is created or updated. |
2290 | * |
2291 | * @since 2.0.3 |
2292 | * |
2293 | * @param string $nickname The user's nickname. |
2294 | */ |
2295 | $meta['nickname'] = apply_filters( 'pre_user_nickname', $nickname ); |
2296 |
|
2297 | $first_name = empty( $userdata['first_name'] ) ? '' : $userdata['first_name']; |
2298 |
|
2299 | /** |
2300 | * Filters a user's first name before the user is created or updated. |
2301 | * |
2302 | * @since 2.0.3 |
2303 | * |
2304 | * @param string $first_name The user's first name. |