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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 |
---|---|
108 | * Filter the returned ID of an uploaded attachment. |
109 | * |
110 | * The dynamic portion of the hook name, `$type`, refers to the attachment type, |
111 | * such as 'image', 'audio', 'video', 'file', etc. |
112 | * |
113 | * @since 2.5.0 |
114 | * |
115 | * @param int $id Uploaded attachment ID. |
116 | */ |
117 | echo apply_filters( "async_upload_{$type}", $id ); |
118 | } |
119 |
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