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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 |
---|---|
127 | /** |
128 | * Filters the array of missing image sub-sizes for an uploaded image. |
129 | * |
130 | * @since 5.3.0 |
131 | * |
132 | * @param array $missing_sizes Array with the missing image sub-sizes. |
133 | * @param array $image_meta The image meta data. |
134 | * @param int $attachment_id The image attachment post ID. |
135 | */ |
136 | return apply_filters( 'wp_get_missing_image_subsizes', $missing_sizes, $image_meta, $attachment_id ); |
137 | } |
138 |
|
139 | /** |
140 | * If any of the currently registered image sub-sizes are missing, |
141 | * create them and update the image meta data. |
142 | * |
143 | * @since 5.3.0 |
144 | * |
145 | * @param int $attachment_id The image attachment post ID. |