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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 |
|---|---|
| 22 | ); |
| 23 | |
| 24 | /** |
| 25 | * Filters the available tabs in the legacy (pre-3.5.0) media popup. |
| 26 | * |
| 27 | * @since 2.5.0 |
| 28 | * |
| 29 | * @param string[] $_default_tabs An array of media tabs. |
| 30 | */ |
| 31 | return apply_filters( 'media_upload_tabs', $_default_tabs ); |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Adds the gallery tab back to the tabs array if post has image attachments |
| 36 | * |
| 37 | * @since 2.5.0 |
| 38 | * |
| 39 | * @global wpdb $wpdb WordPress database abstraction object. |
| 40 | * |