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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 |
|---|---|
| 2411 | */ |
| 2412 | $excerpt_length = apply_filters( 'excerpt_length', 55 ); |
| 2413 | /** |
| 2414 | * Filter the string in the "more" link displayed after a trimmed excerpt. |
| 2415 | * |
| 2416 | * @since 2.9.0 |
| 2417 | * |
| 2418 | * @param string $more_string The string shown within the more link. |
| 2419 | */ |
| 2420 | $excerpt_more = apply_filters( 'excerpt_more', ' ' . '[…]' ); |
| 2421 | $text = wp_trim_words( $text, $excerpt_length, $excerpt_more ); |
| 2422 | } |
| 2423 | /** |
| 2424 | * Filter the trimmed excerpt string. |
| 2425 | * |
| 2426 | * @since 2.8.0 |
| 2427 | * |
| 2428 | * @param string $text The trimmed text. |
| 2429 | * @param string $raw_excerpt The text prior to trimming. |