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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 |
|---|---|
| 2269 | */ |
| 2270 | function get_space_used() { |
| 2271 | /** |
| 2272 | * Filter the amount of storage space used by the current site. |
| 2273 | * |
| 2274 | * @since 3.5.0 |
| 2275 | * |
| 2276 | * @param int|bool $space_used The amount of used space, in megabytes. Default false. |
| 2277 | */ |
| 2278 | $space_used = apply_filters( 'pre_get_space_used', false ); |
| 2279 | if ( false === $space_used ) { |
| 2280 | $upload_dir = wp_upload_dir(); |
| 2281 | $space_used = get_dirsize( $upload_dir['basedir'] ) / 1024 / 1024; |
| 2282 | } |
| 2283 | |
| 2284 | return $space_used; |
| 2285 | } |
| 2286 | |
| 2287 | /** |