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<?php $regex = '~ function #function keyword \s+ #any number of whitespaces (?P<function_name>.*?) #function name itself \s* #optional white spaces (?P<parameters>\(.*?\)) #function parameters \s* #optional white spaces (?P<body>\{.*?\}) #body of a function ~six'; if (preg_match_all($regex, 'print_r(abc,assdd)', $matches)) { print_r($matches); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/lkJkn
function name:  (null)
number of ops:  11
compiled vars:  !0 = $regex, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   ASSIGN                                                   !0, '%7E%0A++function+++++++++++++++++%23function+keyword%0A++%5Cs%2B++++++++++++++++++++++%23any+number+of+whitespaces+%0A++%28%3FP%3Cfunction_name%3E.%2A%3F%29+++%23function+name+itself%0A++%5Cs%2A++++++++++++++++++++++%23optional+white+spaces%0A++%28%3FP%3Cparameters%3E%5C%28.%2A%3F%5C%29%29++%23function+parameters%0A++%5Cs%2A++++++++++++++++++++++%23optional+white+spaces%0A++%28%3FP%3Cbody%3E%5C%7B.%2A%3F%5C%7D%29++++++++%23body+of+a+function%0A%7Esix'
   16     1        INIT_FCALL                                               'preg_match_all'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 'print_r%28abc%2Cassdd%29'
          4        SEND_REF                                                 !1
          5        DO_ICALL                                         $3      
          6      > JMPZ                                                     $3, ->10
   17     7    >   INIT_FCALL                                               'print_r'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
   18    10    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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