Increment a count by +4

[jarvis]

Hi All,

 

Incredibly simple I'm sure! I have an if while loop with a counter.

 

$i = 0;

 

How can I rewrite this part :

if($i == 1 || $i == 5 || $i == 9 || $i == 13 ){

 

I tried if($i % 4 === 0){ but that's not right

 

Thanks

[cyberRobot]

If you're looking to split data in groups of 4, you could use array_chunk():

http://www.php.net/manual/en/function.array-chunk.php

[jarvis]

Thanks cyberRobot, was hoping to just use something similar to the code I had if poss?

[cyberRobot]

This seems to work:

 

if($i % 4 == 1) {

[Psycho]

Did you think to test what the result of ($i % 4) would be for different values of $i? If you had it would have shown that you were on the right track, but made one flaw.

for($i=0; $i<14; $i++)
{
    echo "{$i} : mod 4 = " . ($i%4) . "<br>\n";
}

Here are the results of that test (I've highlighted the ones that I think you should pay attention to:

 

 

0 : mod 4 = 0

1 : mod 4 = 1
2 : mod 4 = 2
3 : mod 4 = 3
4 : mod 4 = 0
5 : mod 4 = 1
6 : mod 4 = 2
7 : mod 4 = 3
8 : mod 4 = 0
9 : mod 4 = 1
10 : mod 4 = 2
11 : mod 4 = 3
12 : mod 4 = 0

13 : mod 4 = 1

 

EDIT: cyberRobot beat me to it (because he took the easy route ), but I wanted to hopefully teach you how to solve problems like this in the future.

Edited May 1, 2014 by Psycho

[jarvis]

Ah thank you!

[Psycho]

You marked your own response as the best answer?

[jarvis]

Am so sorry! I thought it was a 'mark as solved' overall, not a specific part of the thread. I've altered this now and would like to say thanks once again for the help!