wp-admin/includes/class-wp-filesystem-ftpext.php:313Gets the permissions of the specified file or filepath in their octal format.
$filestringstring public function getchmod( $file ) { $dir = $this->dirlist( $file ); return $dir[ $file ]['permsn']; }Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-filesystem-ftpext.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.