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<?php $a = 'hello, [how]foo[how]bar. please don\'t remove [are] you?'; echo preg_replace('~\[.*?\]~', '', $a); echo PHP_EOL . "there should be no space between foo and bar :)";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CTv9s
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'hello%2C+%5Bhow%5Dfoo%5Bhow%5Dbar.+please+don%27t+remove+%5Bare%5D+you%3F'
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%7E%5C%5B.%2A%3F%5C%5D%7E'
          3        SEND_VAL                                                 ''
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
    5     7        ECHO                                                     '%0Athere+should+be+no+space+between+foo+and+bar+%3A%29'
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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