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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 |
|---|---|
| 1113 | |
| 1114 | /** |
| 1115 | * Filters the maximum image width to be included in a 'srcset' attribute. |
| 1116 | * |
| 1117 | * @since 4.4.0 |
| 1118 | * |
| 1119 | * @param int $max_width The maximum image width to be included in the 'srcset'. Default '1600'. |
| 1120 | * @param array $size_array Array of width and height values in pixels (in that order). |
| 1121 | */ |
| 1122 | $max_srcset_image_width = apply_filters( 'max_srcset_image_width', 1600, $size_array ); |
| 1123 | |
| 1124 | // Array to hold URL candidates. |
| 1125 | $sources = array(); |
| 1126 | |
| 1127 | /** |
| 1128 | * To make sure the ID matches our image src, we will check to see if any sizes in our attachment |
| 1129 | * meta match our $image_src. If no matches are found we don't return a srcset to avoid serving |
| 1130 | * an incorrect image. See #35045. |
| 1131 | */ |