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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 |
|---|---|
| 131 | |
| 132 | /** |
| 133 | * Filters the upload base directory to delete when the site is deleted. |
| 134 | * |
| 135 | * @since MU (3.0.0) |
| 136 | * |
| 137 | * @param string $uploads['basedir'] Uploads path without subdirectory. @see wp_upload_dir() |
| 138 | * @param int $blog_id The site ID. |
| 139 | */ |
| 140 | $dir = apply_filters( 'wpmu_delete_blog_upload_dir', $uploads['basedir'], $blog_id ); |
| 141 | $dir = rtrim( $dir, DIRECTORY_SEPARATOR ); |
| 142 | $top_dir = $dir; |
| 143 | $stack = array($dir); |
| 144 | $index = 0; |
| 145 | |
| 146 | while ( $index < count( $stack ) ) { |
| 147 | // Get indexed directory from stack |
| 148 | $dir = $stack[$index]; |
| 149 | |