+/**
+ * Execute a shell command, returning both stdout and stderr. Convenience
+ * function, as all the arguments to wfShellExec can become unwieldy.
+ *
+ * @note This also includes errors from limit.sh, e.g. if $wgMaxShellFileSize is exceeded.
+ * @param string $cmd Command line, properly escaped for shell.
+ * @param &$retval null|Mixed optional, will receive the program's exit code.
+ * (non-zero is usually failure)
+ * @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 wgShellMax* limits.
+ * @return string collected stdout and stderr as a string
+ */
+function wfShellExecWithStderr( $cmd, &$retval = null, $environ = array(), $limits = array() ) {
+ return wfShellExec( $cmd, $retval, $environ, $limits, array( 'duplicateStderr' => true ) );
+}
+