<?php $str = "This is a string"; $str = $str . " with some more text"; $str .= " and a newline at the end.\n"; $num = 9; $str = "<p>Number: $num</p>"; $num = 9; $str = '<p>Number: $num</p>'; $str = 'This is a test.'; $first = $str[0]; $str = 'This is still a test.'; $last = $str[strlen($str)-1]; ?>