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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 |
|---|---|
| 1322 | * |
| 1323 | * @param int $max_width The maximum image width to be included in the 'srcset'. Default '2048'. |
| 1324 | * @param int[] $size_array { |
| 1325 | * An array of requested width and height values. |
| 1326 | * |
| 1327 | * @type int $0 The width in pixels. |
| 1328 | * @type int $1 The height in pixels. |
| 1329 | * } |
| 1330 | */ |
| 1331 | $max_srcset_image_width = apply_filters( 'max_srcset_image_width', 2048, $size_array ); |
| 1332 | |
| 1333 | // Array to hold URL candidates. |
| 1334 | $sources = array(); |
| 1335 | |
| 1336 | /** |
| 1337 | * To make sure the ID matches our image src, we will check to see if any sizes in our attachment |
| 1338 | * meta match our $image_src. If no matches are found we don't return a srcset to avoid serving |
| 1339 | * an incorrect image. See #35045. |
| 1340 | */ |