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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 |
|---|---|
| 192 | |
| 193 | /** |
| 194 | * Filter the image HTML markup including the caption shortcode. |
| 195 | * |
| 196 | * @since 2.6.0 |
| 197 | * |
| 198 | * @param string $shcode The image HTML markup with caption shortcode. |
| 199 | * @param string $html The image HTML markup. |
| 200 | */ |
| 201 | return apply_filters( 'image_add_caption_shortcode', $shcode, $html ); |
| 202 | } |
| 203 | add_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 ); |
| 204 | |
| 205 | /** |
| 206 | * Private preg_replace callback used in image_add_caption() |
| 207 | * |
| 208 | * @access private |
| 209 | * @since 3.4.0 |
| 210 | */ |