!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> $PHP Lexical Structure

< soul >

< body >

PHP Lexical Structure

See code in Code View for all examples.

Case Sensitivity

Variables are case-sensitive. They always start 'with a lower-case alpha'. (I assume this means, 'with a lower-case alphabetical character, not a numeral.' Also, apparently single quotes aren't kosher for the Echo command, double quotes are.)

Harry
Marry
Larry

Case and Space

Commands, such as Echo, are not case-sensitive. But prevailing practice is to write 'em lower-case. / You can have word spaces or not have 'em; but again, it's nice to echo, if i may, traditional English syntax and use spaces between symbols, etc so things are legible.

Harry
Marry
Larry

Commenting in code

Use double-slashes "//" at front (only) for a single-line comment.

//doo-dee-doo, here I am a single line slicker hangin' out. Why 'm I visiblein Design View & not orange? Cuz I'm not wihin PHP code tags.

Use slash and star "/* */" to enclose a multiple-line one.

/* doo-dah dadda-BING dah-dah BAAAHM 's wat I ahm, mon */

Reserved Key Words

Avoid using elsewhere within code: Echo, Break, False, True

Top Down Assignment

Ron
Now Ron is a long long string.

< /body >

< /soul >