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<?php $string = 'This is a test!'; var_dump(trim(preg_replace('/[^a-zA-Z0-9aîâs?t?AÎÂST\s\-]/u','', strtolower($string))));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/6LsfL
function name:  (null)
number of ops:  16
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'This+is+a+test%21'
    4     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'trim'
          3        INIT_FCALL                                               'preg_replace'
          4        SEND_VAL                                                 '%2F%5B%5Ea-zA-Z0-9a%C3%AE%C3%A2s%3Ft%3FA%C3%8E%C3%82ST%5Cs%5C-%5D%2Fu'
          5        SEND_VAL                                                 ''
          6        INIT_FCALL                                               'strtolower'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $2      
          9        SEND_VAR                                                 $2
         10        DO_ICALL                                         $3      
         11        SEND_VAR                                                 $3
         12        DO_ICALL                                         $4      
         13        SEND_VAR                                                 $4
         14        DO_ICALL                                                 
         15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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