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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 |
|---|---|
| 1532 | * |
| 1533 | * @since 2.6.0 |
| 1534 | * |
| 1535 | * @see img_caption_shortcode() |
| 1536 | * |
| 1537 | * @param string $output The caption output. Default empty. |
| 1538 | * @param array $attr Attributes of the caption shortcode. |
| 1539 | * @param string $content The image element, possibly wrapped in a hyperlink. |
| 1540 | */ |
| 1541 | $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); |
| 1542 | if ( $output != '' ) { |
| 1543 | return $output; |
| 1544 | } |
| 1545 | |
| 1546 | $atts = shortcode_atts( |
| 1547 | array( |
| 1548 | 'id' => '', |
| 1549 | 'caption_id' => '', |
| 1550 | 'align' => 'alignnone', |