PHP How do you determine every Nth iteration of a loop

Question

I wanted to echo an image every after 3 post via XML here is my code     lt  php    URL of the XML feed   feed    test xml      How many items do we want to display     display   3     Check our XML file exists if  file exists  feed       die  The XML file could not be found          First  open the XML file   xml   simplexml load file  feed      Set the counter for counting how many items we ve displayed   counter   0     Start the loop to display each item  foreach  xml- gt post as  post      echo       lt div style  float left  width  180px  margin-top 20px  margin-bottom 10px   gt   image file lt  a gt   lt div class  design-sample-txt  gt     post- gt author   lt  div gt  lt  div gt           Increase the counter by one     counter         Check to display all the items we want to    if  counter  gt   3        echo  image file             if  counter     display           Yes  End the loop        break             No  Continue      gt    here is a sample first 3 are correct but now it doesn t loop idgc ca web-design-samples-testing php

User · Answer

Use the modulo arithmetic operation found here in the PHP manual.

e.g.

$x = 3;

for($i=0; $i<10; $i++)
{
    if($i % $x == 0)
    {
        // display image
    }
}

For a more detailed understanding of modulus calculations, click here.

User · Answer

every 3 posts   if  counter   3    0       echo IMAGE

User · Answer

You can also do it without modulus  Just reset your counter when it matches   if  counter    2       matches every 3 iterations    echo  image-file       counter   0

User · Answer

It will not work for first position so better solution is    if   counter    0  amp  amp   counter   3    0       echo  image file       Check it by yourself  I have tested it for adding class for every 4th element

User · Answer

Going off of  Powerlord s answer       There is one catch  0   3 is equal to 0  This could result in   unexpected results if your counter starts at 0     You can still start your counter at 0  arrays  querys   but offset it  if    counter   1    3    0      echo  image file

User · Answer

I am using this a status update to show a     character every 1000 iterations  and it seems to be working good   if   ucounter   1000    0    echo

User · Answer

How about  if   counter    display     0

User · Answer

The easiest way is to use the modulus division operator   if   counter   3    0       echo  image file       How this works  Modulus division returns the remainder   The remainder is always equal to 0 when you are at an even multiple   There is one catch  0   3 is equal to 0   This could result in unexpected results if your counter starts at 0

[php] PHP: How do you determine every Nth iteration of a loop?

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