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<?php $str1 = 'football'; $str2 = 'footboll'; $str_pos = strspn($str1 ^ $str2, "\0"); printf('First difference between two strings at position %d: "%s" vs "%s"', $str_pos, $str1[$str_pos], $str2[$str_pos]); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/amgfv
function name:  (null)
number of ops:  17
compiled vars:  !0 = $str1, !1 = $str2, !2 = $str_pos
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                                           ~5      !0, !1
          4        SEND_VAL                                                 ~5
          5        SEND_VAL                                                 '%00'
          6        DO_ICALL                                         $6      
          7        ASSIGN                                                   !2, $6
    5     8        INIT_FCALL                                               'printf'
          9        SEND_VAL                                                 'First+difference+between+two+strings+at+position+%25d%3A+%22%25s%22+vs+%22%25s%22'
    6    10        SEND_VAR                                                 !2
         11        FETCH_DIM_R                                      ~8      !0, !2
         12        SEND_VAL                                                 ~8
         13        FETCH_DIM_R                                      ~9      !1, !2
         14        SEND_VAL                                                 ~9
         15        DO_ICALL                                                 
    7    16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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