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<?php $start = date_parse_from_format('Y-m-d H:i:s', ''); var_dump($start);
based on 3FeIR
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jkmiL
function name:  (null)
number of ops:  9
compiled vars:  !0 = $start
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'date_parse_from_format'
         1        SEND_VAL                                                 'Y-m-d+H%3Ai%3As'
         2        SEND_VAL                                                 ''
         3        DO_ICALL                                         $1      
         4        ASSIGN                                                   !0, $1
   4     5        INIT_FCALL                                               'var_dump'
         6        SEND_VAR                                                 !0
         7        DO_ICALL                                                 
         8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0