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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 |
---|---|
697 | * Possible hook names include: |
698 | * |
699 | * - `image_upload_iframe_src` |
700 | * - `media_upload_iframe_src` |
701 | * |
702 | * @since 3.0.0 |
703 | * |
704 | * @param string $upload_iframe_src The upload iframe source URL. |
705 | */ |
706 | $upload_iframe_src = apply_filters( "{$type}_upload_iframe_src", $upload_iframe_src ); |
707 |
|
708 | return add_query_arg( 'TB_iframe', true, $upload_iframe_src ); |
709 | } |
710 |
|
711 | /** |
712 | * Handles form submissions for the legacy media uploader. |
713 | * |
714 | * @since 2.5.0 |
715 | * |