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<?php date_default_timezone_set("UTC"); var_dump( strtotime('0000-00-00 00:00:00') );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8gqCK
function name:  (null)
number of ops:  10
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                                   'date_default_timezone_set'
          1        SEND_VAL                                                     'UTC'
          2        DO_ICALL                                                     
    4     3        INIT_FCALL                                                   'var_dump'
          4        INIT_FCALL                                                   'strtotime'
          5        SEND_VAL                                                     '0000-00-00+00%3A00%3A00'
          6        DO_ICALL                                             $1      
          7        SEND_VAR                                                     $1
          8        DO_ICALL                                                     
          9      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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