- * @param &$retval null|Mixed optional, will receive the program's exit code.
- * (non-zero is usually failure). If there is an error from
- * read, select, or proc_open(), this will be set to -1.
- * @param array $environ optional environment variables which should be
- * added to the executed command environment.
- * @param array $limits optional array with limits(filesize, memory, time, walltime)
- * this overwrites the global wgMaxShell* limits.
+ * @param null|mixed &$retval Optional, will receive the program's exit code.
+ * (non-zero is usually failure). If there is an error from
+ * read, select, or proc_open(), this will be set to -1.
+ * @param array $environ Optional environment variables which should be
+ * added to the executed command environment.
+ * @param array $limits Optional array with limits(filesize, memory, time, walltime)
+ * this overwrites the global wgMaxShell* limits.