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<?php //$str = "ryat\0".str_repeat('i',1024); //link('/in/01E2M','b'); $str = "/vmlinuz"; //var_dump(readlink($str)); var_dump(tempnam("/tmp", "FOOa\0/\0a")); //var_dump(basename("../"));
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/BuJSP
function name:  (null)
number of ops:  9
compiled vars:  !0 = $str
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   5     0  E >   ASSIGN                                                   !0, '%2Fvmlinuz'
   8     1        INIT_FCALL                                               'var_dump'
         2        INIT_FCALL                                               'tempnam'
         3        SEND_VAL                                                 '%2Ftmp'
         4        SEND_VAL                                                 'FOOa%00%2F%00a'
         5        DO_ICALL                                         $2      
         6        SEND_VAR                                                 $2
         7        DO_ICALL                                                 
         8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0