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<?php $text="('x-csrf-token', 'whatever')"; preg_match("/x-csrf-token',\s*'([^']+)/mi",$text,$matches); $token=$matches[1]; var_dump($token);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WjKhb
function name:  (null)
number of ops:  12
compiled vars:  !0 = $text, !1 = $matches, !2 = $token
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%28%27x-csrf-token%27%2C+%27whatever%27%29'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2Fx-csrf-token%27%2C%5Cs%2A%27%28%5B%5E%27%5D%2B%29%2Fmi'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    4     6        FETCH_DIM_R                                      ~5      !1, 1
          7        ASSIGN                                                   !2, ~5
    5     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !2
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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