PHP MySQL - Stilson.net

CHAPTER 3 • PHP BASICSwww.it-ebooks.infoTable 3-14. Recognized Escape SequencesSequenceDescription\n Newline character\r Carriage return\t Horizontal tab\\ Backslash\$ Dollar sign\" Double quote\[0-7]{1,3} Octal notation\x[0-9A-Fa-f]{1,2}Hexadecimal notationSingle QuotesEnclosing a string within single quotes is useful when the string should be interpreted exactly as stated.This means that both variables and escape sequences will not be interpreted when the string is parsed.For example, consider the following single-quoted string:print 'This string will $print exactly as it\'s \n declared.';This produces the following:This string will $print exactly as it's \n declared.Note that the single quote located in it's was escaped. Omitting the backslash escape character willresult in a syntax error. Consider another example:print 'This is another string.\\';This produces the following:This is another string.\In this example, the backslash appearing at the conclusion of the string has to be escaped;otherwise, the PHP parser would understand that the trailing single quote was to be escaped. However, ifthe backslash were to appear anywhere else within the string, there would be no need to escape it.76