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<?php $string = 'address 1'; $last_word = array_pop(explode(' ', $string)); echo $last_word; ?>
based on aE5hI
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/eLZD4
function name:  (null)
number of ops:  11
compiled vars:  !0 = $string, !1 = $last_word
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, 'address+1'
   4     1        INIT_FCALL                                               'array_pop'
         2        INIT_FCALL                                               'explode'
         3        SEND_VAL                                                 '+'
         4        SEND_VAR                                                 !0
         5        DO_ICALL                                         $3      
         6        SEND_VAR_NO_REF                               7          $3
         7        DO_ICALL                                         $4      
         8        ASSIGN                                                   !1, $4
   6     9        ECHO                                                     !1
        10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.1.0