How do I find and replace substrings in PHP?

To find and replace substrings in PHP, you can use the str_replace() function. This function takes three arguments: the string to be replaced, the replacement string, and the original string.

Here’s an example:


        <?php
        // Original string
        $originalString = "Hello, world!";

        // Substring to find
        $find = "world";

        // Replacement substring
        $replace = "PHP";

        // Replacing the substring
        $newString = str_replace($find, $replace, $originalString);

        echo $newString; // Output: Hello, PHP!
        ?>