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<?php $a = "foobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisout"; $b = str_repeat("a", 300); echo "Static Var\n"; testCopy($a); echo "Dynamic Var\n"; testCopy($b); $c = $a . "test"; echo memory_get_usage() . "\n"; function testCopy($var) { echo memory_get_usage() . "\n"; $var = (string) $var; echo memory_get_usage() . "\n"; }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/dprNi
function name:  (null)
number of ops:  21
compiled vars:  !0 = $a, !1 = $b, !2 = $c
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'foobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisout'
    4     1        INIT_FCALL                                               'str_repeat'
          2        SEND_VAL                                                 'a'
          3        SEND_VAL                                                 300
          4        DO_ICALL                                         $4      
          5        ASSIGN                                                   !1, $4
    5     6        ECHO                                                     'Static+Var%0A'
    6     7        INIT_FCALL_BY_NAME                                       'testCopy'
          8        SEND_VAR_EX                                              !0
          9        DO_FCALL                                      0          
    7    10        ECHO                                                     'Dynamic+Var%0A'
    8    11        INIT_FCALL_BY_NAME                                       'testCopy'
         12        SEND_VAR_EX                                              !1
         13        DO_FCALL                                      0          
    9    14        CONCAT                                           ~8      !0, 'test'
         15        ASSIGN                                                   !2, ~8
   10    16        INIT_FCALL                                               'memory_get_usage'
         17        DO_ICALL                                         $10     
         18        CONCAT                                           ~11     $10, '%0A'
         19        ECHO                                                     ~11
   16    20      > RETURN                                                   1

Function testcopy:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/dprNi
function name:  testCopy
number of ops:  12
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E >   RECV                                             !0      
   13     1        INIT_FCALL                                               'memory_get_usage'
          2        DO_ICALL                                         $1      
          3        CONCAT                                           ~2      $1, '%0A'
          4        ECHO                                                     ~2
   14     5        CAST                                          6  ~3      !0
          6        ASSIGN                                                   !0, ~3
   15     7        INIT_FCALL                                               'memory_get_usage'
          8        DO_ICALL                                         $5      
          9        CONCAT                                           ~6      $5, '%0A'
         10        ECHO                                                     ~6
   16    11      > RETURN                                                   null

End of function testcopy

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