wp-admin/includes/class-wp-filesystem-ssh2.php:692Creates a directory.
$pathstring$chmodint|falseoptionalfalse$chownstring|int|falseoptionalfalse$chgrpstring|int|falseoptionalfalsebool public function mkdir( $path, $chmod = false, $chown = false, $chgrp = false ) { $path = untrailingslashit( $path ); if ( empty( $path ) ) { return false; } if ( ! $chmod ) { $chmod = FS_CHMOD_DIR; } if ( ! ssh2_sftp_mkdir( $this->sftp_link, $path, $chmod, true ) ) { return false; } // Set directory permissions. ssh2_sftp_chmod( $this->sftp_link, $path, $chmod ); if ( $chown ) { $this->chown( $path, $chown ); } if ( $chgrp ) { $this->chgrp( $path, $chgrp ); } return true; }Introduced in 2.7.0. 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-ssh2.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.