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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 |
|---|---|
| 2395 | * Filters the default media display states for items in the Media list table. |
| 2396 | * |
| 2397 | * @since 3.2.0 |
| 2398 | * @since 4.8.0 Added the `$post` parameter. |
| 2399 | * |
| 2400 | * @param string[] $media_states An array of media states. Default 'Header Image', |
| 2401 | * 'Background Image', 'Site Icon', 'Logo'. |
| 2402 | * @param WP_Post $post The current attachment object. |
| 2403 | */ |
| 2404 | return apply_filters( 'display_media_states', $media_states, $post ); |
| 2405 | } |
| 2406 | |
| 2407 | /** |
| 2408 | * Tests support for compressing JavaScript from PHP. |
| 2409 | * |
| 2410 | * Outputs JavaScript that tests if compression from PHP works as expected |
| 2411 | * and sets an option with the result. Has no effect when the current user |
| 2412 | * is not an administrator. To run the test again the option 'can_compress_scripts' |
| 2413 | * has to be deleted. |