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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 |
|---|---|
| 2113 | * |
| 2114 | * @since 2.6.0 |
| 2115 | * |
| 2116 | * @see img_caption_shortcode() |
| 2117 | * |
| 2118 | * @param string $output The caption output. Default empty. |
| 2119 | * @param array $attr Attributes of the caption shortcode. |
| 2120 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 2121 | */ |
| 2122 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 2123 | |
| 2124 | if ( ! empty( $output ) ) { |
| 2125 | return $output; |
| 2126 | } |
| 2127 | |
| 2128 | $atts = shortcode_atts( |
| 2129 | array( |
| 2130 | 'id' => '', |
| 2131 | 'caption_id' => '', |