PHP loop foreach determine 2nd and 3rd iteration - php

Question

How can I detect 2nd and 3rd iteration
Here's what I did but It doesn't give the right answer
$sample_array = array('boom 1','boom 2','boom 3','boom 4','boom 5','boom 6','boom 7');
$separator2 = 0;
$separator3 = 0;
foreach($sample_array as $sample_array_value){
if(++$separator3 % 3 == 0)
{
echo $sample_array_value."<br /><br /> Separator 3 <br /><br />";
}
else if(++$separator2 % 2 == 0)
{
echo $sample_array_value."<br /><br /> Separator 2 <br /><br />";
}
else
{
echo $sample_array_value."<br />";
}
}
the output of that code is:
boom 1
boom 2
Separator 2
boom 3
Separator 3
boom 4
boom 5
Separator 2
boom 6
Separator 3
boom 7
Which is wrong, I need the output to be:
boom 1
boom 2
Separator 2
boom 3
Separator 3
boom 4
Separator 2
boom 5
boom 6
Separator 2
Separator 3
boom 7

Answer 1

You don't need extra variables, since your array is 0-based indexed, you can just use the key. Also you have to change your logic a bit, so that you get your expected output, e.g.
foreach($sample_array as $key => $sample_array_value){
echo $sample_array_value . "<br />";
if(($key + 1) % 2 == 0 && ($key + 1) % 3 == 0)
echo "<br>Separator 2 <br />Separator 3<br /><br />";
elseif(($key + 1) % 2 == 0)
echo "<br>Separator 2 <br /><br />";
elseif(($key + 1) % 3 == 0)
echo "<br>Separator 3 <br /><br />";
}
output:
boom 1
boom 2
Separator 2
boom 3
Separator 3
boom 4
Separator 2
boom 5
boom 6
Separator 2
Separator 3
boom 7

Answer 2

You're suppose to check for 2nd and 3rd outside the if that implements the boom. since you also want the separator to be done after the boom, then bring it down.
$sample_array = array('boom 1','boom 2','boom 3','boom 4','boom 5','boom 6','boom 7');
$separator2 = 0;
$separator3 = 0;
$count = 1;
foreach($sample_array as $sample_array_value){
echo $sample_array_value."<br />";
if($count % 3 == 0)
{
echo "Separator 3 <br />";
}
if($count % 2 == 0)
{
echo "Separator 2 <br /><br />";
}
$count++;
}