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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 |
|---|---|
| 1719 | * |
| 1720 | * @param array|false $dimensions Array with first element being the width |
| 1721 | * and second element being the height, or |
| 1722 | * false if dimensions could not be determined. |
| 1723 | * @param string $image_src The image source file. |
| 1724 | * @param array $image_meta The image meta data as returned by |
| 1725 | * 'wp_get_attachment_metadata()'. |
| 1726 | * @param int $attachment_id The image attachment ID. Default 0. |
| 1727 | */ |
| 1728 | return apply_filters( 'wp_image_src_get_dimensions', $dimensions, $image_src, $image_meta, $attachment_id ); |
| 1729 | } |
| 1730 | |
| 1731 | /** |
| 1732 | * Adds 'srcset' and 'sizes' attributes to an existing 'img' element. |
| 1733 | * |
| 1734 | * @since 4.4.0 |
| 1735 | * |
| 1736 | * @see wp_calculate_image_srcset() |
| 1737 | * @see wp_calculate_image_sizes() |