$retval = '';
$return = wfShellExec( $cmd, $retval );
$x = preg_match(
'/Version: ImageMagick ([0-9]*\.[0-9]*\.[0-9]*)/', $return, $matches
);
if ( $x != 1 ) {
$retval = '';
$return = wfShellExec( $cmd, $retval );
$x = preg_match(
'/Version: ImageMagick ([0-9]*\.[0-9]*\.[0-9]*)/', $return, $matches
);
if ( $x != 1 ) {