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run code in 300+ PHP versions simultaneously
<?php $thing = null; echo "\n---\n"; if ( $thing->count ) { echo "YES, there is a count.\n"; } else { echo "NO count\n"; } echo "\n---\n"; if ( $thing instanceof StdClass && $thing->count ) { echo "YES, there is a count.\n"; } else { echo "NO count\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 6
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
2 jumps found. (Code = 46) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
Branch analysis from position: 6
2 jumps found. (Code = 46) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
Branch analysis from position: 12
filename:       /in/E4uk7
function name:  (null)
number of ops:  17
compiled vars:  !0 = $thing
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    5     1        ECHO                                                     '%0A---%0A'
    6     2        FETCH_OBJ_R                                      ~2      !0, 'count'
          3      > JMPZ                                                     ~2, ->6
    7     4    >   ECHO                                                     'YES%2C+there+is+a+count.%0A'
    6     5      > JMP                                                      ->7
    9     6    >   ECHO                                                     'NO+count%0A'
   13     7    >   ECHO                                                     '%0A---%0A'
   14     8        INSTANCEOF                                       ~3      !0, 'StdClass'
          9      > JMPZ_EX                                          ~3      ~3, ->12
         10    >   FETCH_OBJ_R                                      ~4      !0, 'count'
         11        BOOL                                             ~3      ~4
         12    > > JMPZ                                                     ~3, ->15
   15    13    >   ECHO                                                     'YES%2C+there+is+a+count.%0A'
   14    14      > JMP                                                      ->16
   17    15    >   ECHO                                                     'NO+count%0A'
   18    16    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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