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<?php var_dump(array_column( [(object) ['foo' => 'bar']], 'foo' ));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5SX5A
function name:  (null)
number of ops:  10
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'array_column'
   4     2        MAKE_REF                                         ~0      <array>
         3        INIT_ARRAY                                       ~1      ~0
         4        SEND_VAL                                                 ~1
   5     5        SEND_VAL                                                 'foo'
         6        DO_ICALL                                         $2      
         7        SEND_VAR                                                 $2
         8        DO_ICALL                                                 
   6     9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.4.0