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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 |
|---|---|
| 2301 | */ |
| 2302 | function get_space_used() { |
| 2303 | /** |
| 2304 | * Filter the amount of storage space used by the current site. |
| 2305 | * |
| 2306 | * @since 3.5.0 |
| 2307 | * |
| 2308 | * @param int|bool $space_used The amount of used space, in megabytes. Default false. |
| 2309 | */ |
| 2310 | $space_used = apply_filters( 'pre_get_space_used', false ); |
| 2311 | if ( false === $space_used ) { |
| 2312 | $upload_dir = wp_upload_dir(); |
| 2313 | $space_used = get_dirsize( $upload_dir['basedir'] ) / 1024 / 1024; |
| 2314 | } |
| 2315 | |
| 2316 | return $space_used; |
| 2317 | } |
| 2318 | |
| 2319 | /** |