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<?php $array1 = [ ["Paris SG", "Brest", "Monaco", "Nizza", "Lilla", "Lens"], ["Marsiglia", "Rennes", "Reims", "Lione", "Tolosa", "Strasburgo"], ["Le Havre", "Montpellier", "Lorient", "Nantes", "Metz", "Clermont"], ]; $array2 = [ "Sturm Graz", "Rennes", "Sturm Graz", "Reims", "Tolosa", "Le Havre", "Paris SG", "Lione", "Clermont", "Montpellier", "Lorient", "Strasburgo" ]; var_export(array_diff($array2, ...$array1)); echo "\n---\n"; var_export(array_diff_key($array2, array_diff($array2, ...$array1)));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/EC0DF
function name:  (null)
number of ops:  24
compiled vars:  !0 = $array1, !1 = $array2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    9     1        ASSIGN                                                   !1, <array>
   24     2        INIT_FCALL                                               'var_export'
          3        INIT_FCALL                                               'array_diff'
          4        SEND_VAR                                                 !1
          5        SEND_UNPACK                                              !0
          6        CHECK_UNDEF_ARGS                                         
          7        DO_ICALL                                         $4      
          8        SEND_VAR                                                 $4
          9        DO_ICALL                                                 
   26    10        ECHO                                                     '%0A---%0A'
   28    11        INIT_FCALL                                               'var_export'
         12        INIT_FCALL                                               'array_diff_key'
         13        SEND_VAR                                                 !1
         14        INIT_FCALL                                               'array_diff'
         15        SEND_VAR                                                 !1
         16        SEND_UNPACK                                              !0
         17        CHECK_UNDEF_ARGS                                         
         18        DO_ICALL                                         $6      
         19        SEND_VAR                                                 $6
         20        DO_ICALL                                         $7      
         21        SEND_VAR                                                 $7
         22        DO_ICALL                                                 
         23      > RETURN                                                   1

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