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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 |
|---|---|
| 706 | * Possible hook names include: |
| 707 | * |
| 708 | * - `image_upload_iframe_src` |
| 709 | * - `media_upload_iframe_src` |
| 710 | * |
| 711 | * @since 3.0.0 |
| 712 | * |
| 713 | * @param string $upload_iframe_src The upload iframe source URL. |
| 714 | */ |
| 715 | $upload_iframe_src = apply_filters( "{$type}_upload_iframe_src", $upload_iframe_src ); |
| 716 | |
| 717 | return add_query_arg( 'TB_iframe', true, $upload_iframe_src ); |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * Handles form submissions for the legacy media uploader. |
| 722 | * |
| 723 | * @since 2.5.0 |
| 724 | * |