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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 |
|---|---|
| 1717 | * @since 3.7.0 |
| 1718 | * |
| 1719 | * @see img_caption_shortcode() |
| 1720 | * |
| 1721 | * @param int $width Width of the caption in pixels. To remove this inline style, |
| 1722 | * return zero. |
| 1723 | * @param array $atts Attributes of the caption shortcode. |
| 1724 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 1725 | */ |
| 1726 | $caption_width = apply_filters( 'img_caption_shortcode_width', $width, $atts, $content ); |
| 1727 | |
| 1728 | $style = ''; |
| 1729 | |
| 1730 | if ( $caption_width ) { |
| 1731 | $style = 'style="width: ' . (int) $caption_width . 'px" '; |
| 1732 | } |
| 1733 | |
| 1734 | if ( $html5 ) { |
| 1735 | $html = sprintf( |