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<?php function foo() { return 'foo.txt'; } var_dump( is_writable( foo() ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rkaMp
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'is_writable'
          2        INIT_FCALL                                               'foo'
          3        DO_FCALL                                      0  $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                         $1      
          6        SEND_VAR                                                 $1
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rkaMp
function name:  foo
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E > > RETURN                                                   'foo.txt'
    4     1*     > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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