Using PHP to add to strings or join string with string variables

In PHP programming, one constantly has to be reminded of how to add a string of text to an existing one dynamically. We first create a line of string text and assign it to a string variable. We add onto the string in the following manner:

$instn = $instn . "No shaping is needed from waist to underarm as their widths are the same.\n\n";

Remember to add the new string to the variable with '.' or else the new text will replace all previous text in the variable.