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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 |
|---|---|
| 2545 | */ |
| 2546 | $excerpt_length = apply_filters( 'excerpt_length', 55 ); |
| 2547 | /** |
| 2548 | * Filter the string in the "more" link displayed after a trimmed excerpt. |
| 2549 | * |
| 2550 | * @since 2.9.0 |
| 2551 | * |
| 2552 | * @param string $more_string The string shown within the more link. |
| 2553 | */ |
| 2554 | $excerpt_more = apply_filters( 'excerpt_more', ' ' . '[…]' ); |
| 2555 | $text = wp_trim_words( $text, $excerpt_length, $excerpt_more ); |
| 2556 | } |
| 2557 | /** |
| 2558 | * Filter the trimmed excerpt string. |
| 2559 | * |
| 2560 | * @since 2.8.0 |
| 2561 | * |
| 2562 | * @param string $text The trimmed text. |
| 2563 | * @param string $raw_excerpt The text prior to trimming. |