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<?php $str = "экономика и управление на предприятии"; $search = 'ЭкОн'; var_dump(preg_match('/' . $search . '/i', $str));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rZUel
function name:  (null)
number of ops:  12
compiled vars:  !0 = $str, !1 = $search
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%D1%8D%D0%BA%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D0%BA%D0%B0+%D0%B8+%D1%83%D0%BF%D1%80%D0%B0%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BD%D0%B0+%D0%BF%D1%80%D0%B5%D0%B4%D0%BF%D1%80%D0%B8%D1%8F%D1%82%D0%B8%D0%B8'
    5     1        ASSIGN                                                   !1, '%D0%AD%D0%BA%D0%9E%D0%BD'
    7     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'preg_match'
          4        CONCAT                                           ~4      '%2F', !1
          5        CONCAT                                           ~5      ~4, '%2Fi'
          6        SEND_VAL                                                 ~5
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $6      
          9        SEND_VAR                                                 $6
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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