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<?php $origString = 'My-Cool-String - 201'; $newString = preg_replace("/-(?=.* -)/", ' ', $origString); echo $newString;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ugqQE
function name:  (null)
number of ops:  9
compiled vars:  !0 = $origString, !1 = $newString
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'My-Cool-String+-+201'
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F-%28%3F%3D.%2A+-%29%2F'
          3        SEND_VAL                                                 '+'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $3      
          6        ASSIGN                                                   !1, $3
    5     7        ECHO                                                     !1
    6     8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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