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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 |
|---|---|
| 1853 | * @return string The excerpt. |
| 1854 | */ |
| 1855 | function wp_trim_excerpt($text) { |
| 1856 | $raw_excerpt = $text; |
| 1857 | if ( '' == $text ) { |
| 1858 | $text = get_the_content(''); |
| 1859 | |
| 1860 | $text = strip_shortcodes( $text ); |
| 1861 | |
| 1862 | $text = apply_filters('the_content', $text); |
| 1863 | $text = str_replace(']]>', ']]>', $text); |
| 1864 | $text = strip_tags($text); |
| 1865 | $excerpt_length = apply_filters('excerpt_length', 55); |
| 1866 | $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]'); |
| 1867 | $words = preg_split("/[\n\r\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY); |
| 1868 | if ( count($words) > $excerpt_length ) { |
| 1869 | array_pop($words); |
| 1870 | $text = implode(' ', $words); |
| 1871 | $text = $text . $excerpt_more; |