The workshop is designed to help you anticipate possible questions, review what you've learned, and begin putting your knowledge into practice.
| 1: | True or false: If a function doesn't require an argument, you can omit the parentheses in the function call. |
| 2: | How do you return a value from a function? |
| 3: | What would the following code fragment print to the browser?
$number = 50;
function tenTimes() {
$number = $number * 10;
}
tenTimes();
echo $number;
|
| 4: | What would the following code fragment print to the browser?
$number = 50;
function tenTimes() {
global $number;
$number = $number * 10;
}
tenTimes();
echo $number;
|
| 5: | What would the following code fragment print to the browser?
$number = 50;
function tenTimes( &$n ) {
$n = $n * 10;
}
tenTimes( $number );
echo $number;
|
| A1: | The statement is false. You must always include the parentheses in your function calls, whether you are passing arguments to the function or not. |
| A2: | You must use the return keyword. |
| A3: | It would print 50. The tenTimes() function has no access to the global $number variable. When it is called, it will manipulate its own local $number variable. |
| A4: | It would print 500. We have used the global statement, which gives the tenTimes() function access to the $number variable. |
| A5: | It would print 500. By adding the ampersand to the parameter variable $n, we ensure that this argument is passed by reference. $n and $number point to the same value, so any changes to $n will be reflected when you access $number. |
| Q1: | Create a function that accepts four string variables and returns a string that contains an HTML table element, enclosing each of the variables in its own cell. |