PHP Arrays
An array stores multiple values in one single variable. It is one of the most versatile and commonly used data structures in PHP.
If a variable is a single box, an array is a filing cabinet.
1. Indexed Arrays
Arrays with a numeric index. The index automatically starts at 0.
$cars = ["Volvo", "BMW", "Toyota"];
echo "I like " . $cars[0] . ".";2. Associative Arrays
Arrays with named keys that you assign to them. This is similar to a Dictionary or Hash Map in other languages.
$ages = ["Peter" => 35, "Ben" => 37, "Joe" => 43];
echo "Peter is " . $ages['Peter'] . " years old.";3. Multidimensional Arrays
Arrays containing one or more arrays.
$cars = [
["Volvo", 22, 18],
["BMW", 15, 13],
["Saab", 5, 2]
];
echo $cars[0][0] . ": In stock: " . $cars[0][1];4. Common Functions
count($arr): Get the number of elements.array_push($arr, $val): Add element to end.array_pop($arr): Remove element from end.foreach($arr as $item): Loop through the array.