Question

I’ve been trying to use preg_replace to replace period within my string to comma.

For example,

<?php
$string = "Hey you.";
$new_string = preg_replace("/./", ",", $new_string);
echo $new_string;
?>

I do have an error in here in which I am aware, because I am quite confused with patterns. Any insights? Thanks.

Answer 1

Use str_replace

$new_string = str_replace(".", ",", $new_string);

The problem with your regex is that you haven’t escaped the ., and . is matching any character.

You can do this

$new_string = preg_replace("/\./", ",", $new_string);