$ php -v
PHP 7.1.5 (cli) (built: May 13 2017 13:30:32) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.1.5, Copyright (c) 1999-2017, by Zend Technologies
    with Xdebug v2.5.4, Copyright (c) 2002-2017, by Derick Rethans
--------------------------------
$ cat test.php
<?php
echo 1 + 2;
--------------------------------
$ php -dvld.active=1 test.php
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /data/test.php
function name:  (null)
number of ops:  3
compiled vars:  none
line     -------------------------------------------------------------------------------------
   2     0  E >   EXT_STMT
         1        ECHO                                                     3
   4     2      > RETURN                                                   1