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<?php var_dump( array_map('intval', explode(',',null)));
based on olZFN
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DaJR5
function name:  (null)
number of ops:  12
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'array_map'
         2        SEND_VAL                                                 'intval'
         3        INIT_FCALL                                               'explode'
         4        SEND_VAL                                                 '%2C'
         5        SEND_VAL                                                 null
         6        DO_ICALL                                         $0      
         7        SEND_VAR                                                 $0
         8        DO_ICALL                                         $1      
         9        SEND_VAR                                                 $1
        10        DO_ICALL                                                 
        11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0