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<?php $days = array('2'); var_dump(array_filter($days, 'alter_days')); function alter_days(&$day) { return 'bla'; }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/iU1Lr
function name:  (null)
number of ops:  9
compiled vars:  !0 = $days
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'array_filter'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 'alter_days'
          5        DO_ICALL                                         $2      
          6        SEND_VAR                                                 $2
          7        DO_ICALL                                                 
   11     8      > RETURN                                                   1

Function alter_days:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/iU1Lr
function name:  alter_days
number of ops:  3
compiled vars:  !0 = $day
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
   10     1      > RETURN                                                   'bla'
   11     2*     > RETURN                                                   null

End of function alter_days

Generated using Vulcan Logic Dumper, using php 8.0.0


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