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<?php echo preg_replace( '/^(\s+)?$/', 'empty', ' x ' );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7eN8M
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_replace'
    4     1        SEND_VAL                                                 '%2F%5E%28%5Cs%2B%29%3F%24%2F'
    5     2        SEND_VAL                                                 'empty'
    6     3        SEND_VAL                                                 '%0A%09%09%0A%09%09x%0A%09%09%0A%09%09'
          4        DO_ICALL                                         $0      
          5        ECHO                                                     $0
   11     6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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