Question

When I’ve a string:

$string = 'word1="abc.3" word2="xyz.3"';

How can I replace the point with a comma after xyz in xyz.3 and keep him after abc in abc.3?

Answer 1

You’ve provided an example but not a description of when the content should be modified and when it should be kept the same. The solution might be simply:

str_replace("xyz.", "xyz", $input);

But if you explicitly want a more explicit match, say requiring a digit after the ful stop, then:

preg_replace("/xyz\.([0-9])+/", 'xyz\${1}', $input);

(not tested)