Source View: validate_username

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
1209      /**
1210       * Filter whether the provided username is valid or not.
1211       *
1212       * @since 2.0.1
1213       *
1214       * @param bool   $valid    Whether given username is valid.
1215       * @param string $username Username to check.
1216       */
1217      return apply_filters( 'validate_username', $valid, $username );
1218 }
1220 /**
1221  * Insert a user into the database.
1222  *
1223  * Most of the `$userdata` array fields have filters associated with the values. Exceptions are
1224  * 'ID', 'rich_editing', 'comment_shortcuts', 'admin_color', 'use_ssl',
1225  * 'user_registered', and 'role'. The filters have the prefix 'pre_user_' followed by the field
1226  * name. An example using 'description' would have the filter called, 'pre_user_description' that