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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 |
---|---|
2119 | * |
2120 | * @since 2.6.0 |
2121 | * |
2122 | * @see img_caption_shortcode() |
2123 | * |
2124 | * @param string $output The caption output. Default empty. |
2125 | * @param array $attr Attributes of the caption shortcode. |
2126 | * @param string $content The image element, possibly wrapped in a hyperlink. |
2127 | */ |
2128 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
2129 |
|
2130 | if ( ! empty( $output ) ) { |
2131 | return $output; |
2132 | } |
2133 |
|
2134 | $atts = shortcode_atts( |
2135 | array( |
2136 | 'id' => '', |
2137 | 'caption_id' => '', |