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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 |
---|---|
2386 | * |
2387 | * @since 2.6.0 |
2388 | * |
2389 | * @see img_caption_shortcode() |
2390 | * |
2391 | * @param string $output The caption output. Default empty. |
2392 | * @param array $attr Attributes of the caption shortcode. |
2393 | * @param string $content The image element, possibly wrapped in a hyperlink. |
2394 | */ |
2395 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
2396 |
|
2397 | if ( ! empty( $output ) ) { |
2398 | return $output; |
2399 | } |
2400 |
|
2401 | $atts = shortcode_atts( |
2402 | array( |
2403 | 'id' => '', |
2404 | 'caption_id' => '', |