Combine two arrays

Question

I have two arrays like this   array    11    gt   11    22    gt   22    33    gt   33    44    gt   44      array    44    gt   44    55    gt   55    66    gt   66    77    gt   77       I want to combine these two array such that it does not contains duplicate and as well as keep their original keys  For example output should be   array    11    gt   11    22    gt   22    33    gt   33    44    gt   44    55    gt   55    66    gt   66    77    gt   77       I have tried this but it is changing their original keys    output   array unique  array merge   array1    array2        Any solution

User · Answer

To do this  you can loop through one and append to the other    lt  php   test1   array    11    gt   11    22    gt   22    33    gt   33    44    gt   44       test2   array    44    gt   44    55    gt   55    66    gt   66    77    gt   77       function combineWithKeys  array1   array2        foreach  array1 as  key  gt  value   array2  key     value      asort  array2       return  array2      print r combineWithKeys  test1   test2       gt    UPDATE  KingCrunch came up with the best solution  print r  array1  array2

User · Answer

This works    output    array1    array2

User · Answer

The new way of doing it with php7 4 is Spread operator         parts     apple    pear     fruits     banana    orange       parts   watermelon    var dump  fruits     Spread operator should have better performance than array merge  A significant advantage of Spread operator is that it supports any traversable objects  while the array merge function only supports arrays

User · Answer

https   www php net manual en function array-merge php   lt  php  array1   array  color    gt   red   2  4    array2   array  a    b    color    gt   green    shape    gt   trapezoid   4    result   array merge  array1   array2   print r  result     gt

User · Answer

You should take to consideration that  array1    array2     array2    array1   array1   array   11    gt   x1    22    gt   x1          array2   array   22    gt   x2    33    gt   x2        with  array1    array2   array1    array2   array   11    gt   x1    22    gt   x1    33    gt   x2       and with  array2    array1   array2    array1   array     11    gt   x1      22    gt   x2      33    gt   x2

User · Answer

This works    a   array 1   gt  1  2   gt  2  3   gt  3    b   array 4   gt  4  5   gt  5  6   gt  6    c    a    b  print r  c

User · Answer

Warning   array1    array2 overwrites keys  so my solution  for multidimensional arrays  is to use array unique   array unique array merge  a   b   SORT REGULAR    Notice   5 2 10  Changed the default value of sort flags back to SORT STRING  5 2 9   Default is SORT REGULAR  5 2 8- Default is SORT STRING  It perfectly works  Hope it helps same

User · Answer

If you are using PHP 7 4 or above  you can use the spread operator     as the following examples from the PHP Docs    arr1    1  2  3    arr2        arr1      1  2  3   arr3    0      arr1      0  1  2  3   arr4   array     arr1      arr2  111      1  2  3  1  2  3  111   arr5        arr1      arr1      1  2  3  1  2  3   function getArr       return   a    b       arr6       getArr     c        a    b    c     arr7       new ArrayIterator   a    b    c          a    b    c    function arrGen         for  i   11   i  lt  15   i              yield  i           arr8       arrGen        11  12  13  14    It works like in JavaScript ES6   See more on https   wiki php net rfc spread operator for array

User · Answer

Just use    output   array merge  array1   array2     That should solve it  Because you use string keys if one key occurs more than one time  like  44  in your example  one key will overwrite proceding ones with the same name  Because in your case they both have the same value anyway it doesn t matter and it will also remove duplicates   Update  I just realised  that PHP treats the numeric string-keys as numbers  integers  and so will behave like this  what means  that it renumbers the keys too     A workaround is to recreate the keys     output   array combine  output   output     Update 2  I always forget  that there is also an operator  in bold  because this is really what you are looking for   D    output    array1    array2    All of this can be seen in  http   php net manual en function array-merge php

[php] Combine two arrays

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