脫逸字元escape character

http://www.tuxradar.com/practicalphp/2/6/2

\"

Print the next character as a double quote, not a string closer

\'

Print the next character as a single quote, not a string closer

\n

Print a new line character (remember our print statements?)

\t

Print a tab character

\r

Print a carriage return (not used very often)

\$

Print the next character as a dollar, not as part of a variable

\\

Print the next character as a backslash, not an escape character