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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 |
|---|---|
| 1911 | $meta = array(); |
| 1912 | |
| 1913 | /** |
| 1914 | * Filter a user's nicename before the user is created or updated. |
| 1915 | * |
| 1916 | * @since 2.0.3 |
| 1917 | * |
| 1918 | * @param string $user_nicename The user's nicename. |
| 1919 | */ |
| 1920 | $user_nicename = apply_filters( 'pre_user_nicename', $user_nicename ); |
| 1921 | |
| 1922 | $raw_user_url = empty( $userdata['user_url'] ) ? '' : $userdata['user_url']; |
| 1923 | |
| 1924 | /** |
| 1925 | * Filter a user's URL before the user is created or updated. |
| 1926 | * |
| 1927 | * @since 2.0.3 |
| 1928 | * |
| 1929 | * @param string $raw_user_url The user's URL. |