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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 |
|---|---|
| 692 | * Filters the upload iframe source URL for a specific media type. |
| 693 | * |
| 694 | * The dynamic portion of the hook name, `$type`, refers to the type |
| 695 | * of media uploaded. |
| 696 | * |
| 697 | * @since 3.0.0 |
| 698 | * |
| 699 | * @param string $upload_iframe_src The upload iframe source URL by type. |
| 700 | */ |
| 701 | $upload_iframe_src = apply_filters( "{$type}_upload_iframe_src", $upload_iframe_src ); |
| 702 | |
| 703 | return add_query_arg( 'TB_iframe', true, $upload_iframe_src ); |
| 704 | } |
| 705 | |
| 706 | /** |
| 707 | * Handles form submissions for the legacy media uploader. |
| 708 | * |
| 709 | * @since 2.5.0 |
| 710 | * |