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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 |
---|---|
611 | * Filter the upload iframe source URL for a specific media type. |
612 | * |
613 | * The dynamic portion of the hook name, `$type`, refers to the type |
614 | * of media uploaded. |
615 | * |
616 | * @since 3.0.0 |
617 | * |
618 | * @param string $upload_iframe_src The upload iframe source URL by type. |
619 | */ |
620 | $upload_iframe_src = apply_filters( $type . '_upload_iframe_src', $upload_iframe_src ); |
621 |
|
622 | return add_query_arg('TB_iframe', true, $upload_iframe_src); |
623 | } |
624 |
|
625 | /** |
626 | * Handles form submissions for the legacy media uploader. |
627 | * |
628 | * @since 2.5.0 |
629 | * |