PHP: How to sort the characters in a string?

Question

I have a set of strings containing characters in a PHP script, I need to sort those characters in each string.

For example:

"bac" -> "abc"
"abc" -> "abc"
"" -> ""
"poeh" -> "ehop"

These characters don't have accents and are all lower case. How can I perform this in PHP?

Answer 1

I would make it an array and use the sort function:

$string = 'bac';

$stringParts = str_split($string);
sort($stringParts);
echo implode($stringParts); // abc