How to find the foreach index

Question

Is it possible to find the foreach index   in a for loop as follows   for   i   0   i  lt  10     i       echo  i             i will give you the index   Do I have to use the for loop or is there some way to get the index in the foreach loop

User · Answer

I solved this way  when I had to use the foreach index and value in the same context    array   array  a    b    c    foreach   array as  letter  gt  index       echo  letter    Here  letter content is the actual index   echo  array  letter      echoes the array value     foreach

User · Answer

You can put a hack in your foreach  such as a field incremented on each run-through  which is exactly what the for loop gives you in a numerically-indexed array  Such a field would be a pseudo-index that needs manual management  increments  etc    A foreach will give you your index in the form of your  key value  so such a hack shouldn t be necessary   e g   in a foreach   index   0  foreach  data as  key  gt  val           Use  key as an index  or                manage the index this way       echo  Index is  index n        index

User · Answer

PHP arrays have internal pointers  so try this   foreach  array as  key   gt   value       index   current  array       Works okay for me  only very preliminarily tested though

User · Answer

I think best option is like same   foreach   lists as  key  gt  value        echo  key 1      it is easy and normally

User · Answer

PHP arrays have internal pointers  so try this   foreach  array as  key   gt   value       index   current  array       Works okay for me  only very preliminarily tested though

User · Answer

Jonathan is correct   PHP arrays act as a map table mapping keys to values   in some cases you can get an index if your array is defined  such as    var   array 2 5    for   i   0   i  lt  count  var    i          echo  var  i    n       your output will be   2 5   in which case each element in the array has a knowable index  but if you then do something like the following   var   array push  var 10    for   i   0   i  lt  count  var    i          echo  var  i    n       you get no output   This happens because arrays in PHP are not linear structures like they are in most languages   They are more like hash tables that may or may not have keys for all stored values   Hence foreach doesn t use indexes to crawl over them because they only have an index if the array is defined   If you need to have an index  make sure your arrays are fully defined before crawling over them  and use a for loop

User · Answer

It should be noted that you can call key   on any array to find the current key its on  As you can guess current   will return the current value and next   will move the array s pointer to the next element

User · Answer

foreach  array as  key  gt  value           do stuff      key is the index of each  array element

User · Answer

I would like to add this  I used this in laravel to just index my table    With  loop- index I also preincrement it with    loop to start at 1   My Code    foreach  resultsPerCountry- gt first  - gt studies as  result     lt tr gt       lt td gt       loop- gt index   lt  td gt                                         lt  tr gt   endforeach

User · Answer

You can create  i outside the loop and do  i   at the bottom of the loop

User · Answer

foreach array keys  array  as  key        do stuff

User · Answer

Owen has a good answer   If you want just the key  and you are working with an array this might also be useful   foreach array keys  array  as  key        do stuff

User · Answer

These two loops are equivalent  bar the safety railings of course    for   i 0   i lt count  things    i             foreach   things as  i  gt  thing            eg  for   i 0   i lt count  things    i          echo  Thing    i   is    things  i      foreach   things as  i  gt  thing        echo  Thing    i   is    thing

User · Answer

I normally do this when working with associative arrays   foreach   assoc array as  key   gt   value       do something     This will work fine with non-associative arrays too    key will be the index value   If you prefer  you can do this too   foreach   array as  indx   gt   value        do something

[php] How to find the foreach index?

Examples related to php

Examples related to loops

Examples related to foreach