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<?php $val = "1,2,3"; $val2 = "1"; var_dump(count(explode(',', $val))); var_dump(count(explode(',', $val2)));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rsN39
function name:  (null)
number of ops:  19
compiled vars:  !0 = $val, !1 = $val2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '1%2C2%2C3'
    3     1        ASSIGN                                                   !1, '1'
    4     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'explode'
          4        SEND_VAL                                                 '%2C'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $4      
          7        COUNT                                            ~5      $4
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                                 
    5    10        INIT_FCALL                                               'var_dump'
         11        INIT_FCALL                                               'explode'
         12        SEND_VAL                                                 '%2C'
         13        SEND_VAR                                                 !1
         14        DO_ICALL                                         $7      
         15        COUNT                                            ~8      $7
         16        SEND_VAL                                                 ~8
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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