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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 |
|---|---|
| 1476 | $time = current_time( 'mysql' ); |
| 1477 | $y = substr( $time, 0, 4 ); |
| 1478 | $m = substr( $time, 5, 2 ); |
| 1479 | $subdir = "/$y/$m"; |
| 1480 | } |
| 1481 | |
| 1482 | $dir .= $subdir; |
| 1483 | $url .= $subdir; |
| 1484 | |
| 1485 | $uploads = apply_filters( 'upload_dir', array( 'path' => $dir, 'url' => $url, 'subdir' => $subdir, 'basedir' => $bdir, 'baseurl' => $burl, 'error' => false ) ); |
| 1486 | |
| 1487 | // Make sure we have an uploads dir |
| 1488 | if ( ! wp_mkdir_p( $uploads['path'] ) ) { |
| 1489 | $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $uploads['path'] ); |
| 1490 | return array( 'error' => $message ); |
| 1491 | } |
| 1492 | |
| 1493 | return $uploads; |
| 1494 | } |