PHP count, add colons every 2 characters

php count add
DiegoP. picture DiegoP. · Jun 17, 2011 · Viewed 10.4k times · Source

I have this string

1010081-COP-8-27-20110616214459

I need to count the last 6 characters starting from the end of this string (because it could may be long starting from the begin)

Then I need to add colons after every 2 characters.

So after counting 6 characters from the end it will be 

214459

After having added the colons it will look like:

21:44:59

Can you help me achieving it?

I do not really know where to start!

Thank you

Answer

Explosion Pills picture Explosion Pills · Jun 17, 2011

You can do this with substr, str_split and implode

The code is done on multiple lines for clarity, but can easily be done in a chain on one line:

$str = '1010081-COP-8-27-20110616214459';
//Get last 6 chars
$end = substr($str, -6);
//Split string into an array.  Each element is 2 chars
$chunks = str_split($end, 2);
//Convert array to string.  Each element separated by the given separator.
$result = implode(':', $chunks);

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