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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 |
|---|---|
| 195 | * |
| 196 | * Passing an empty value also prevents the {@see 'image_add_caption_shortcode'} |
| 197 | * Filters from being evaluated at the end of image_add_caption(). |
| 198 | * |
| 199 | * @since 4.1.0 |
| 200 | * |
| 201 | * @param string $caption The original caption text. |
| 202 | * @param int $id The attachment ID. |
| 203 | */ |
| 204 | $caption = apply_filters( 'image_add_caption_text', $caption, $id ); |
| 205 | |
| 206 | /** |
| 207 | * Filters whether to disable captions. |
| 208 | * |
| 209 | * Prevents image captions from being appended to image HTML when inserted into the editor. |
| 210 | * |
| 211 | * @since 2.6.0 |
| 212 | * |
| 213 | * @param bool $bool Whether to disable appending captions. Returning true from the filter |