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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 |
|---|---|
| 166 | * |
| 167 | * Passing an empty value also prevents the {@see 'image_add_caption_shortcode'} |
| 168 | * filter from being evaluated at the end of {@see image_add_caption()}. |
| 169 | * |
| 170 | * @since 4.1.0 |
| 171 | * |
| 172 | * @param string $caption The original caption text. |
| 173 | * @param int $id The attachment ID. |
| 174 | */ |
| 175 | $caption = apply_filters( 'image_add_caption_text', $caption, $id ); |
| 176 | |
| 177 | /** |
| 178 | * Filter whether to disable captions. |
| 179 | * |
| 180 | * Prevents image captions from being appended to image HTML when inserted into the editor. |
| 181 | * |
| 182 | * @since 2.6.0 |
| 183 | * |
| 184 | * @param bool $bool Whether to disable appending captions. Returning true to the filter |