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<?php $value = '2010-10-21 54:25:'; //$pattern = '(\d{4}(-\d{2})?(-\d{2})?( \d{2})?(:\d{2})?(:\d{2})?)'; $pattern = '^[(\d{4}-\d{2}-\d{2} \d{2}:\d{2}(:\d{2})?)]+$'; var_dump(preg_match('/' . $pattern . '/', $value));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jmsEP
function name:  (null)
number of ops:  12
compiled vars:  !0 = $value, !1 = $pattern
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '2010-10-21+54%3A25%3A'
    7     1        ASSIGN                                                   !1, '%5E%5B%28%5Cd%7B4%7D-%5Cd%7B2%7D-%5Cd%7B2%7D+%5Cd%7B2%7D%3A%5Cd%7B2%7D%28%3A%5Cd%7B2%7D%29%3F%29%5D%2B%24'
    9     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'preg_match'
          4        CONCAT                                           ~4      '%2F', !1
          5        CONCAT                                           ~5      ~4, '%2F'
          6        SEND_VAL                                                 ~5
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $6      
          9        SEND_VAR                                                 $6
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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