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<?php preg_match('/(?>([A-Za-z])+([A-Za-z])+)/', 'FooBar', $m); var_dump($m); preg_match('/([A-Za-z])++([A-Za-z])+/', 'FooBar', $m); var_dump($m);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CufRm
function name:  (null)
number of ops:  17
compiled vars:  !0 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%28%3F%3E%28%5BA-Za-z%5D%29%2B%28%5BA-Za-z%5D%29%2B%29%2F'
          2        SEND_VAL                                                 'FooBar'
          3        SEND_REF                                                 !0
          4        DO_ICALL                                                 
    4     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
    6     8        INIT_FCALL                                               'preg_match'
          9        SEND_VAL                                                 '%2F%28%5BA-Za-z%5D%29%2B%2B%28%5BA-Za-z%5D%29%2B%2F'
         10        SEND_VAL                                                 'FooBar'
         11        SEND_REF                                                 !0
         12        DO_ICALL                                                 
    7    13        INIT_FCALL                                               'var_dump'
         14        SEND_VAR                                                 !0
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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