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<?php $string = 'abclkjabc'; echo count(array_filter(count_chars($string, 1), fn($count) => $count === 1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Mpcec
function name:  (null)
number of ops:  13
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'abclkjabc'
    4     1        INIT_FCALL                                               'array_filter'
          2        INIT_FCALL                                               'count_chars'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 1
          5        DO_ICALL                                         $2      
          6        SEND_VAR                                                 $2
          7        DECLARE_LAMBDA_FUNCTION                          ~3      [0]
          8        SEND_VAL                                                 ~3
          9        DO_ICALL                                         $4      
         10        COUNT                                            ~5      $4
         11        ECHO                                                     ~5
         12      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Mpcec
function name:  {closure}
number of ops:  4
compiled vars:  !0 = $count
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
          0  E >   RECV                                             !0      
          1        IS_IDENTICAL                                     ~1      !0, 1
          2      > RETURN                                                   ~1
          3*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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