Your task is to complete the below program so that it prints as shown in the example. There's only one missing function that you need to write. Just write that missing function in the text box. Incomplete program:

<?php



    // Your code here



    $charstring = "first\n";

    newvalue($charstring);

    echo "String in the end: $charstring\n";



?>


Example output


String in the start: first
String in the end: New string