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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 |
|---|---|
| 2029 | * |
| 2030 | * @since 2.6.0 |
| 2031 | * |
| 2032 | * @see img_caption_shortcode() |
| 2033 | * |
| 2034 | * @param string $output The caption output. Default empty. |
| 2035 | * @param array $attr Attributes of the caption shortcode. |
| 2036 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 2037 | */ |
| 2038 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 2039 | |
| 2040 | if ( ! empty( $output ) ) { |
| 2041 | return $output; |
| 2042 | } |
| 2043 | |
| 2044 | $atts = shortcode_atts( |
| 2045 | array( |
| 2046 | 'id' => '', |
| 2047 | 'caption_id' => '', |