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<?php var_dump(explode('&',"http://ai.taobao.com/user/login_status2.json?_tb_token_=EAJq2g8UIo&__ajax__=1&pid=mm_15144495_2216478_22298311&unid=&_ksTS=1428485877201_407&callback=jsonp408")); ?>
based on ODTp3
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/BNNVE
function name:  (null)
number of ops:  8
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'explode'
         2        SEND_VAL                                                 '%26'
         3        SEND_VAL                                                 'http%3A%2F%2Fai.taobao.com%2Fuser%2Flogin_status2.json%3F_tb_token_%3DEAJq2g8UIo%26__ajax__%3D1%26pid%3Dmm_15144495_2216478_22298311%26unid%3D%26_ksTS%3D1428485877201_407%26callback%3Djsonp408'
         4        DO_ICALL                                         $0      
         5        SEND_VAR                                                 $0
         6        DO_ICALL                                                 
         7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0