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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 | 
|---|---|
| 423 |                     'option'          => 'time_format' | 
| 424 |                ), | 
| 425 |                'users_can_register'     => array( | 
| 426 |                     'desc'               => __( 'Allow new users to sign up' ), | 
| 427 |                     'readonly'          => false, | 
| 428 |                     'option'          => 'users_can_register' | 
| 429 |                ) | 
| 430 |           ); | 
| 431 |  | 
| 432 |           $this->blog_options = apply_filters( 'xmlrpc_blog_options', $this->blog_options ); | 
| 433 |      } | 
| 434 |  | 
| 435 |      /** | 
| 436 |       * Retrieve the blogs of the user. | 
| 437 |       * | 
| 438 |       * @since 2.6.0 | 
| 439 |       * | 
| 440 |       * @param array $args Method parameters. | 
| 441 |       * @return array |