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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 |
|---|---|
| 224 | } |
| 225 | |
| 226 | return $args[0]; |
| 227 | } |
| 228 | |
| 229 | if ( ! isset( $wp_filter['all'] ) ) { |
| 230 | $wp_current_filter[] = $hook_name; |
| 231 | } |
| 232 | |
| 233 | $filtered = $wp_filter[ $hook_name ]->apply_filters( $args[0], $args ); |
| 234 | |
| 235 | array_pop( $wp_current_filter ); |
| 236 | |
| 237 | return $filtered; |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * Checks if any filter has been registered for a hook. |
| 242 | * |