3v4l.org

run code in 200+ PHP versions simultaneously
<?php var_dump(preg_match("/_total_amount/", "_total_amount"));
based on H4DEJ
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/86n3Z
function name:  (null)
number of ops:  8
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'preg_match'
         2        SEND_VAL                                                 '%2F_total_amount%2F'
         3        SEND_VAL                                                 '_total_amount'
         4        DO_ICALL                                         $0      
         5        SEND_VAR                                                 $0
         6        DO_ICALL                                                 
         7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.4.0