PHP Arrays

An array stores multiple values in a single variable. Indexed arrays use numeric positions starting at zero.

Creating an array

<?php
$fruits = ["apple", "banana", "cherry"];

Accessing items

Use the index in square brackets. Counting starts at 0.

<?php
echo $fruits[0]; // apple
echo $fruits[2]; // cherry

Adding items

Append a value with empty brackets.

<?php
$fruits[] = "orange";
echo $fruits[3]; // orange

Counting items

<?php
echo count($fruits); // 4

Useful array functions

<?php
$numbers = [3, 1, 2];

sort($numbers);            // [1, 2, 3]
echo in_array(2, $numbers); // true
echo implode(", ", $numbers); // "1, 2, 3"
array_push($numbers, 4);   // adds 4 to the end

Quick reference

• count() returns the number of items
• sort() orders the values
• in_array() checks if a value exists
• implode() joins items into a string