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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 |
|---|---|
| 572 | * Filter the upload iframe source URL for a specific media type. |
| 573 | * |
| 574 | * The dynamic portion of the hook name, $type, refers to the type |
| 575 | * of media uploaded. |
| 576 | * |
| 577 | * @since 3.0.0 |
| 578 | * |
| 579 | * @param string $upload_iframe_src The upload iframe source URL by type. |
| 580 | */ |
| 581 | $upload_iframe_src = apply_filters( $type . '_upload_iframe_src', $upload_iframe_src ); |
| 582 | |
| 583 | return add_query_arg('TB_iframe', true, $upload_iframe_src); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * {@internal Missing Short Description}} |
| 588 | * |
| 589 | * @since 2.5.0 |
| 590 | * |