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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 |
|---|---|
| 3878 | $excerpt_length = (int) apply_filters( 'excerpt_length', $excerpt_length ); |
| 3879 | |
| 3880 | /** |
| 3881 | * Filters the string in the "more" link displayed after a trimmed excerpt. |
| 3882 | * |
| 3883 | * @since 2.9.0 |
| 3884 | * |
| 3885 | * @param string $more_string The string shown within the more link. |
| 3886 | */ |
| 3887 | $excerpt_more = apply_filters( 'excerpt_more', ' ' . '[…]' ); |
| 3888 | $text = wp_trim_words( $text, $excerpt_length, $excerpt_more ); |
| 3889 | } |
| 3890 | |
| 3891 | /** |
| 3892 | * Filters the trimmed excerpt string. |
| 3893 | * |
| 3894 | * @since 2.8.0 |
| 3895 | * |
| 3896 | * @param string $text The trimmed text. |