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<?php $str1 = 'football'; $str2 = 'footboll'; echo strspn($str1 ^ $str2, "\0"); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/FEKKk
function name:  (null)
number of ops:  9
compiled vars:  !0 = $str1, !1 = $str2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'football'
    3     1        ASSIGN                                                   !1, 'footboll'
    4     2        INIT_FCALL                                               'strspn'
          3        BW_XOR                                           ~4      !0, !1
          4        SEND_VAL                                                 ~4
          5        SEND_VAL                                                 '%00'
          6        DO_ICALL                                         $5      
          7        ECHO                                                     $5
    6     8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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