Entry Level PHP Web Application Development/Our First Programs: Hello, World!/DQS-Answer

From Wikibooks, open books for an open world
Jump to: navigation, search

A double-quoted string (also known as a double-quoted string literal) has the purpose of including a string into a program, with variable substitution. For example, the string "$foo on you" will appear as on you if $foo is not defined; if $foo contains the value 'Poo', then the resulting string will appear as Poo on you when output to the user’s web browser.