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<?php var_dump(preg_split("/[\s,]+/", "hypertext language, programming", 0)); var_dump(preg_split("/[\s,]+/", "hypertext language, programming", null));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/mo86f
function name:  (null)
number of ops:  17
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'preg_split'
          2        SEND_VAL                                                 '%2F%5B%5Cs%2C%5D%2B%2F'
          3        SEND_VAL                                                 'hypertext+language%2C+programming'
          4        SEND_VAL                                                 0
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
    4     8        INIT_FCALL                                               'var_dump'
          9        INIT_FCALL                                               'preg_split'
         10        SEND_VAL                                                 '%2F%5B%5Cs%2C%5D%2B%2F'
         11        SEND_VAL                                                 'hypertext+language%2C+programming'
         12        SEND_VAL                                                 null
         13        DO_ICALL                                         $2      
         14        SEND_VAR                                                 $2
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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