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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 |
|---|---|
| 296 | if ( $user instanceof WP_User && is_multisite() ) { |
| 297 | /** |
| 298 | * Filter whether the user has been marked as a spammer. |
| 299 | * |
| 300 | * @since 3.7.0 |
| 301 | * |
| 302 | * @param bool $spammed Whether the user is considered a spammer. |
| 303 | * @param WP_User $user User to check against. |
| 304 | */ |
| 305 | $spammed = apply_filters( 'check_is_user_spammed', is_user_spammy(), $user ); |
| 306 | |
| 307 | if ( $spammed ) |
| 308 | return new WP_Error( 'spammer_account', __( '<strong>ERROR</strong>: Your account has been marked as a spammer.' ) ); |
| 309 | } |
| 310 | return $user; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Validate the logged-in cookie. |