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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 |
|---|---|
| 249 | function get_the_excerpt($deprecated = '') { |
| 250 | global $post; |
| 251 | $output = ''; |
| 252 | $output = $post->post_excerpt; |
| 253 | if ( post_password_required($post) ) { |
| 254 | $output = __('There is no excerpt because this is a protected post.'); |
| 255 | return $output; |
| 256 | } |
| 257 | |
| 258 | return apply_filters('get_the_excerpt', $output); |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Whether post has excerpt. |
| 263 | * |
| 264 | * @since 2.3.0 |
| 265 | * |
| 266 | * @param int $id Optional. Post ID. |
| 267 | * @return bool |