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<?php $xml = new \SimpleXMLElement(' <blog-post> <dc:tag xmlns:dc="http://purl.org/dc/elements/1.1/"/> </blog-post>' ); var_dump(isset($xml->tag));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Jve27
function name:  (null)
number of ops:  9
compiled vars:  !0 = $xml
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $1      'SimpleXMLElement'
          1        SEND_VAL_EX                                              '%0A++++%3Cblog-post%3E%0A++++++++%3Cdc%3Atag+xmlns%3Adc%3D%22http%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%22%2F%3E%0A++++%3C%2Fblog-post%3E'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
    8     4        INIT_FCALL                                               'var_dump'
          5        ISSET_ISEMPTY_PROP_OBJ                           ~4      !0, 'tag'
          6        SEND_VAL                                                 ~4
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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