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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 |
---|---|
104 | * Filter the returned ID of an uploaded attachment. |
105 | * |
106 | * The dynamic portion of the hook name, $type, refers to the attachment type, |
107 | * such as 'image', 'audio', 'video', 'file', etc. |
108 | * |
109 | * @since 2.5.0 |
110 | * |
111 | * @param int $id Uploaded attachment ID. |
112 | */ |
113 | echo apply_filters( "async_upload_{$type}", $id ); |
114 | } |
115 |
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