1$array = array(
2    "foo" => "bar",
3    "bar" => "foo",
4);

1$array = array(
2    "foo" => "bar",
3    "bar" => "foo",
4);
5

1#Arrays
2
3<?php
4    #array is a variable that holds multiple values
5    /*
6    Three types of arrays
7        - Indexed
8        - associative
9        - Multi-dimensional
10    */
11    // Indexed array is the most common and easiest
12    $people = array('Kevin', 'Jeremy ', 'Sara');
13    $ids = array(23, 55, 12);
14    $cars = ['Honda', ' Toyota', 'Ford'];  // also an array
15    //add to an array
16    $cars[3] = ' Audi';
17    // you can use empty brackets and it will be added to the last one
18    $cars[] = ' Chevy';
19
20    echo $people[1];
21    echo $ids[1];
22    echo $cars[1];    
23    echo $cars[3];
24    echo $cars[4];
25    echo count($cars);
26    //you can also print the entire array
27    print_r($cars);
28    //to look at data type
29    echo var_dump($cars);
30
31    //Associative Arrays key pairs
32    $people1 = array('Kevin' => 35, 'Jeremy' => 23, 'Sara' => 19);
33    $ids1 = array(23 => 'Kevin', 55 => 'Jeremy', 12 => 'Sara');
34    echo $people1['Kevin'];
35    echo $ids1[23];
36    //add to these types of arrays
37    $people1['Jill'] = 44;
38    echo $people1['Jill'];
39    print_r($people1);
40    var_dump($people1);
41
42    //Multi-Dimensional Arrays aka an array within an array
43 
44    $cars2 = array(
45        array('Honda',20,10),
46        array('Toyota',30,20),
47        array('Ford',23,12)
48    );
49
50    echo $cars2[1][0];
51
52    
53?>

1$my_array = array();

1// sequential array
2$arr = array(
3  'v1',		// $arr[0] == 'v1'
4  'v2',		// $arr[1] == 'v2'
5  'v3'		// $arr[2] == 'v3'
6);
7// or (since PHP 5.4)
8$arr = [
9  'v1',		// $arr[0] == 'v1'
10  'v2',		// $arr[1] == 'v2'
11  'v3'		// $arr[2] == 'v3'
12];
13
14// key accessed array (map like)
15$arr = array(
16  'k1' => 'v1',		// $arr['k1'] == 'v1'
17  'k2' => 'v2',		// $arr['k2'] == 'v2'
18  'k3' => 'v3'		// $arr['k3'] == 'v3'
19);
20// or (since PHP 5.4)
21$arr = [
22  'k1' => 'v1',		// $arr['k1'] == 'v1'
23  'k2' => 'v2',		// $arr['k2'] == 'v2'
24  'k3' => 'v3'		// $arr['k3'] == 'v3'
25];

1
2<?php
3$array = array("foo", "bar", "hello", "world");
4var_dump($array);
5?>
6
7