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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 |
|---|---|
| 1526 | $meta = array(); |
| 1527 | |
| 1528 | /** |
| 1529 | * Filters a user's nicename before the user is created or updated. |
| 1530 | * |
| 1531 | * @since 2.0.3 |
| 1532 | * |
| 1533 | * @param string $user_nicename The user's nicename. |
| 1534 | */ |
| 1535 | $user_nicename = apply_filters( 'pre_user_nicename', $user_nicename ); |
| 1536 | |
| 1537 | $raw_user_url = empty( $userdata['user_url'] ) ? '' : $userdata['user_url']; |
| 1538 | |
| 1539 | /** |
| 1540 | * Filters a user's URL before the user is created or updated. |
| 1541 | * |
| 1542 | * @since 2.0.3 |
| 1543 | * |
| 1544 | * @param string $raw_user_url The user's URL. |