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<?php var_dump(checkdate(12, 31, 2000));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rNdbb
function name:  (null)
number of ops:  11
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'checkdate'
          2        SEND_VAL                                                 12
          3        FETCH_CONSTANT                                   ~0      '%C2%A031'
          4        SEND_VAL                                                 ~0
          5        FETCH_CONSTANT                                   ~1      '%C2%A02000'
          6        SEND_VAL                                                 ~1
          7        DO_ICALL                                         $2      
          8        SEND_VAR                                                 $2
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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