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<?php $string = 'word1&word2 !word3 word4 &word5'; var_export( preg_split('/ |(?<! )(?=[&!])/', $string) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5TSn3
function name:  (null)
number of ops:  9
compiled vars:  !0 = $string
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'word1%26word2+%21word3+word4+%26word5'
    4     1        INIT_FCALL                                                   'var_export'
    5     2        INIT_FCALL                                                   'preg_split'
          3        SEND_VAL                                                     '%2F+%7C%28%3F%3C%21+%29%28%3F%3D%5B%26%21%5D%29%2F'
          4        SEND_VAR                                                     !0
          5        DO_ICALL                                             $2      
          6        SEND_VAR                                                     $2
    4     7        DO_ICALL                                                     
    6     8      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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