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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 |
|---|---|
| 2135 | * |
| 2136 | * @since 2.6.0 |
| 2137 | * |
| 2138 | * @see img_caption_shortcode() |
| 2139 | * |
| 2140 | * @param string $output The caption output. Default empty. |
| 2141 | * @param array $attr Attributes of the caption shortcode. |
| 2142 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 2143 | */ |
| 2144 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 2145 | |
| 2146 | if ( ! empty( $output ) ) { |
| 2147 | return $output; |
| 2148 | } |
| 2149 | |
| 2150 | $atts = shortcode_atts( |
| 2151 | array( |
| 2152 | 'id' => '', |
| 2153 | 'caption_id' => '', |