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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 |
|---|---|
| 52 | $ID = (int) $ID; |
| 53 | $update = true; |
| 54 | } else { |
| 55 | $update = false; |
| 56 | // Password is not hashed when creating new user. |
| 57 | $user_pass = md5($user_pass); |
| 58 | } |
| 59 | |
| 60 | $user_login = sanitize_user($user_login, true); |
| 61 | $user_login = apply_filters('pre_user_login', $user_login); |
| 62 | |
| 63 | if ( empty($user_nicename) ) |
| 64 | $user_nicename = sanitize_title( $user_login ); |
| 65 | $user_nicename = apply_filters('pre_user_nicename', $user_nicename); |
| 66 | |
| 67 | if ( empty($user_url) ) |
| 68 | $user_url = ''; |
| 69 | $user_url = apply_filters('pre_user_url', $user_url); |
| 70 | |