php arrays
#Arrays <?php #array is a variable that holds multiple values /* Three types of arrays - Indexed - associative - Multi-dimensional */ // Indexed array is the most common and easiest $people = array('Kevin', 'Jeremy ', 'Sara'); $ids = array(23, 55, 12); $cars = ['Honda', ' Toyota', 'Ford']; // also an array //add to an array $cars[3] = ' Audi'; // you can use empty brackets and it will be added to the last one $cars[] = ' Chevy'; echo $people[1]; echo $ids[1]; echo $cars[1]; echo $cars[3]; echo $cars[4]; echo count($cars); //you can also print the entire array print_r($cars); //to look at data type echo var_dump($cars); //Associative Arrays key pairs $people1 = array('Kevin' => 35, 'Jeremy' => 23, 'Sara' => 19); $ids1 = array(23 => 'Kevin', 55 => 'Jeremy', 12 => 'Sara'); echo $people1['Kevin']; echo $ids1[23]; //add to these types of arrays $people1['Jill'] = 44; echo $people1['Jill']; print_r($people1); var_dump($people1); //Multi-Dimensional Arrays aka an array within an array $cars2 = array( array('Honda',20,10), array('Toyota',30,20), array('Ford',23,12) ); echo $cars2[1][0]; ?>
