TAKEN – FROM: Page 23 of MySQL+PHP (Next Handbooks)
[Purchased - Sept 05]
The back slash is a UNIX way of escaping the character following, even though DOS and cmd (NT’s DOS replacement) both still use it as a directory separator.
Since UNIX servers served the Internet many (about 21) years before Windows, you will find everything with web programming tools is very UNIX-centric, such as the forward slash file separator. PHP and other such languages are designed with UNIX/Linux structures in mind.
Be mindful of this if your code doesn’t work as you expect it to. Internet Explorer expects people to accidentally use back slashes in URLs and accepts them without telling you that it’s the wrong syntax! SO be careful to type in slashes precisely and in the correct tilt.
GOOGLED – Back slash
http://en.wikipedia.org/wiki/Backslash – > > > In many programming languages such as C and Perl and in Unix scripting languages, the backslash is used to indicate that the character following it should be treated specially. It is sometimes referred to as a knock-down or escape character. In various regular expression languages it acts as a switch, changing literal characters into metacharacters and vice versa.
SHORT and Simple explaination of the behaviour here http://www.wsu.edu/~brians/errors/backslash.html
SLASH – In English text >> http://en.wikipedia.org/wiki/Slash_(punctuation) <<
The most common use is to replace the hyphen or en dash to make clear a strong joint between words or phrases, such as “the Hemingway/Faulkner generation”. Yet very often it is used to represent the concept “or”, especially in instruction books.
AND EXPLAIN http://en.wikipedia.org/wiki/Hyphen-minus
The hyphen-minus is the character at position 2DHEX in ASCII and standards that derive from it. It is used as a hyphen, a minus sign and a dash. This consolidation was a compromise made in the early days of fixed-width typewriters and computer displays. In proper typesetting and present-day graphic design, however, many style guides recommend the use of distinct characters for hyphens, dashes, and the minus sign. Usage of the hyphen-minus nonetheless persists in many contexts, as it is well-known, easy to enter on keyboards, and in the same location in all common character sets.
Most programming languages, restricting themselves to ASCII, use the hyphen-minus, not the Unicode minus sign, for denoting subtraction and negative numbers.
Posted by Gordon Danson