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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 |
|---|---|
| 69 | $tab = (string) $_GET['tab']; |
| 70 | } else { |
| 71 | /** |
| 72 | * Filters the default tab in the legacy (pre-3.5.0) media popup. |
| 73 | * |
| 74 | * @since 2.5.0 |
| 75 | * |
| 76 | * @param string $tab The default media popup tab. Default 'type' (From Computer). |
| 77 | */ |
| 78 | $tab = apply_filters( 'media_upload_default_tab', 'type' ); |
| 79 | } |
| 80 | |
| 81 | $body_id = 'media-upload'; |
| 82 | |
| 83 | // Let the action code decide how to handle the request. |
| 84 | if ( 'type' === $tab || 'type_url' === $tab || ! array_key_exists( $tab, media_upload_tabs() ) ) { |
| 85 | /** |
| 86 | * Fires inside specific upload-type views in the legacy (pre-3.5.0) |
| 87 | * media popup based on the current tab. |