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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 |
---|---|
571 | * @since 2.6.0 |
572 | * |
573 | * @param array $attr Attributes attributed to the shortcode. |
574 | * @param string $content Optional. Shortcode content. |
575 | * @return string |
576 | */ |
577 | function img_caption_shortcode($attr, $content = null) { |
578 |
|
579 | // Allow plugins/themes to override the default caption template. |
580 | $output = apply_filters('img_caption_shortcode', '', $attr, $content); |
581 | if ( $output != '' ) |
582 | return $output; |
583 |
|
584 | extract(shortcode_atts(array( |
585 | 'id' => '', |
586 | 'align' => 'alignnone', |
587 | 'width' => '', |
588 | 'caption' => '' |
589 | ), $attr)); |