3v4l.org

run code in 300+ PHP versions simultaneously
<?php $z = 'bar'; $f = function ($y) use ($z) { echo $x ?? $y ?? $z; }; $f(null); $f('foo');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9lf4d
function name:  (null)
number of ops:  11
compiled vars:  !0 = $z, !1 = $f
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'bar'
    4     1        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2F9lf4d%3A4%240'
          2        BIND_LEXICAL                                             ~3, !0
          3        ASSIGN                                                   !1, ~3
    8     4        INIT_DYNAMIC_CALL                                        !1
          5        SEND_VAL_EX                                              null
          6        DO_FCALL                                      0          
    9     7        INIT_DYNAMIC_CALL                                        !1
          8        SEND_VAL_EX                                              'foo'
          9        DO_FCALL                                      0          
         10      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2F9lf4d%3A4%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9lf4d
function name:  {closure}
number of ops:  8
compiled vars:  !0 = $y, !1 = $z, !2 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
          1        BIND_STATIC                                              !1
    5     2        COALESCE                                         ~3      !2
          3        COALESCE                                         ~4      !0
          4        QM_ASSIGN                                        ~4      !1
          5        QM_ASSIGN                                        ~3      ~4
          6        ECHO                                                     ~3
    6     7      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2F9lf4d%3A4%240

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
168.39 ms | 1393 KiB | 13 Q