Checking during array iteration if the current element is the last element

Question

Please help me to translate this pseudo-code to real php code    foreach   arr as  k   gt   v      if   THIS IS NOT THE LAST ELEMENT IN THE ARRAY          doSomething      Edit  the array may have numerical or string keys

User · Answer

My solution  also quite simple     array           last   count  array  - 1   foreach  array as  index   gt   value          if  index     last             this is last array      else            this is not last array

User · Answer

you can use PHP s end     array   array  a    gt  1  b    gt  2  c    gt  3    lastElement   end  array   foreach  array as  k   gt   v        echo  v     lt br  gt        if  v     lastElement                 you can do something here as this condition states it just entered last element of an array              Update1  as pointed out by  Mijoja the above could will have problem if you have same value multiple times in array  below is the fix for it    array   array  a    gt  1   b    gt  2   c    gt  3   d    gt  2     point to end of the array end  array     fetch key of the last element of the array   lastElementKey   key  array     iterate the array foreach  array as  k   gt   v        if  k     lastElementKey              during array iteration this condition states the last element            Update2  I found solution by  onteria  to be better then what i have answered since it does not modify arrays internal pointer  i am updating the answer to match his answer    array   array  a    gt  1   b    gt  2   c    gt  3   d    gt  2      Get array keys  arrayKeys   array keys  array      Fetch last array key  lastArrayKey   array pop  arrayKeys     iterate array foreach  array as  k   gt   v        if  k     lastArrayKey              during array iteration this condition states the last element            Thank you  onteria   Update3  As pointed by  CGundlach PHP 7 3 introduced array key last which seems much better option if you are using PHP    7 3   array   array  a    gt  1  b    gt  2  c    gt  3    lastKey   array key last  array   foreach  array as  k   gt   v        echo  v     lt br  gt        if  k     lastKey                 you can do something here as this condition states it just entered last element of an array

User · Answer

I know this is old  and using SPL iterator maybe just an overkill  but anyway  another solution here    ary   array 1  2  3  4   last     ary   new ArrayIterator  ary    ary   new CachingIterator  ary   foreach   ary as  each        if    ary- gt hasNext         we chain ArrayIterator and CachingIterator                                just to use this  hasNext    method to see                                if this is the last element        echo  each

User · Answer

This always does the trick for me  foreach  array as  key   gt   value       if  end array keys  array       key            Last key reached     Edit 30 04 15   last key   end array keys  array    reset  array    foreach  array as  key   gt   value      if    key     last key           Last key reached     To avoid the E STRICT warning mentioned by  Warren Sergent   array keys   array keys  array    last key   end  array keys

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myarray   array     test1    gt   foo      test2    gt   bar      test3    gt   baz      test4    gt   waldo       myarray2   array   foo    bar    baz    waldo         Get the last array key  last   array pop array keys  myarray    foreach  myarray as  key   gt   value      if  key     last        echo   key - gt   value n             Get the last array key  last   array pop array keys  myarray2    foreach  myarray2 as  key   gt   value      if  key     last        echo   key - gt   value n           Since array pop works on the temporary array created by array keys it doesn t modify the original array at all     php test php test1 - gt  foo test2 - gt  bar test3 - gt  baz 0 - gt  foo 1 - gt  bar 2 - gt  baz

User · Answer

If the items are numerically ordered  use the key   function to determine the index of the current item and compare it to the length  You d have to use next   or prev   to cycle through items in a while loop instead of a for loop    length   sizeOf  arr   while  key current  arr       length-1         v   current  arr   doSomething  v     do something if not the last item     next  myArray     set pointer to next item

User · Answer

arr   array 1   a   3  4   gt  1   b    gt  1   foreach   arr as  key   gt   val        echo    key      val      end array keys  arr      key                    output  0   1  1   a  2   3  4   1  b   1

User · Answer

Why not this very simple method    i   0    a counter to track which element we are at foreach  array as  index   gt   value         i        if   i    sizeof  array               we are at the last element of the array

[php] Checking during array iteration, if the current element is the last element

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