CS 161 - Introduction to Programming with PHP

Topics that came up along the way...

• Quoted strings and variables
• Single- vs. double-quotes
• Controlling rounding errors

Documenting your code

• Various "styles" of comment syntax
• State what you're doing, in prose
• Don't restate what's obvious from the code, e.g. "Add 1 to $x"
• Describe what blocks of code do; describe statements that aren't obvious
• Be clear, complete, concise!

Arrays

• General syntax
• What can be used as index/keys?

Conditionals and Flow Controls (continued)

• for (initializing-expr; conditional-expr; loop-expr) statement; // equivalent to:
  initializing-expr; while (conditional-expr) { statement; loop-expr; }
• foreach (array_expression as $value) statement;
• foreach (array_expression as $key => $value) statement;
• break
• switch