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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 |
---|---|
823 | * |
824 | * @since 2.6.0 |
825 | * |
826 | * @see img_caption_shortcode() |
827 | * |
828 | * @param string $output The caption output. Default empty. |
829 | * @param array $attr Attributes of the caption shortcode. |
830 | * @param string $content The image element, possibly wrapped in a hyperlink. |
831 | */ |
832 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
833 | if ( $output != '' ) |
834 | return $output; |
835 |
|
836 | $atts = shortcode_atts( array( |
837 | 'id' => '', |
838 | 'align' => 'alignnone', |
839 | 'width' => '', |
840 | 'caption' => '', |
841 | 'class' => '', |