Workshop

Quiz

1:	Which construct can you use to define an array?
2:	What is the index number of the last element of the array defined here? $users = array ("Harry", "Bob", "Sandy");
3:	Without using a function, what would be the easiest way of adding the element "Susan" to the $users array defined previously?
4:	Which function could you use to add the string "Susan" to the $users array?
5:	How would you find out the number of elements in an array?
6:	How would you loop through an array?
7:	Which function would you use to merge two arrays?
8:	How would you sort an associative array by its keys?

Answers

A1:	You can create an array with the array() construct.
A2:	The last element is $users[2]. Remember that arrays are indexed from zero by default.
A3:	You should use $users[] = "Susan";.
A4:	You should use array_push( $users, "Susan" );.
A5:	You can count the number of elements in an array with the count() function.
A6:	You can loop through an array using the foreach statement.
A7:	You can merge arrays with the array_merge() function.
A8:	You can sort an associative array by its keys with the ksort() function.