3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a($a) { static $cache = []; if(!isset($cache[$a])) $cache[$a] = true; return $cache[$a]; } a(1); a(2);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/JvKfO
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E >   INIT_FCALL                                               'a'
          1        SEND_VAL                                                 1
          2        DO_FCALL                                      0          
          3        INIT_FCALL                                               'a'
          4        SEND_VAL                                                 2
          5        DO_FCALL                                      0          
          6      > RETURN                                                   1

Function a:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/JvKfO
function name:  a
number of ops:  10
compiled vars:  !0 = $a, !1 = $cache
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        BIND_STATIC                                              !1
    5     2        ISSET_ISEMPTY_DIM_OBJ                         0  ~2      !1, !0
          3        BOOL_NOT                                         ~3      ~2
          4      > JMPZ                                                     ~3, ->7
          5    >   ASSIGN_DIM                                               !1, !0
          6        OP_DATA                                                  <true>
    6     7    >   FETCH_DIM_R                                      ~5      !1, !0
          8      > RETURN                                                   ~5
    7     9*     > RETURN                                                   null

End of function a

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
173.78 ms | 1397 KiB | 15 Q