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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 |
|---|---|
| 1381 | * |
| 1382 | * @param int $max_width The maximum image width to be included in the 'srcset'. Default '2048'. |
| 1383 | * @param int[] $size_array { |
| 1384 | * An array of requested width and height values. |
| 1385 | * |
| 1386 | * @type int $0 The width in pixels. |
| 1387 | * @type int $1 The height in pixels. |
| 1388 | * } |
| 1389 | */ |
| 1390 | $max_srcset_image_width = apply_filters( 'max_srcset_image_width', 2048, $size_array ); |
| 1391 | |
| 1392 | // Array to hold URL candidates. |
| 1393 | $sources = array(); |
| 1394 | |
| 1395 | /** |
| 1396 | * To make sure the ID matches our image src, we will check to see if any sizes in our attachment |
| 1397 | * meta match our $image_src. If no matches are found we don't return a srcset to avoid serving |
| 1398 | * an incorrect image. See #35045. |
| 1399 | */ |