PHP Arrays

Indexed, associative and multidimensional arrays.

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An array stores many values in one variable.

Indexed: $cars = ["Civic", "Corolla"]; → $cars[0]
Associative: $age = ["Ali" => 25]; → $age["Ali"]
Multidimensional: arrays inside arrays.

count() returns the length. Add items with $arr[] = "new"; or array_push(). print_r() displays an array.

Key Takeaways: PHP Arrays

Mastering PHP Arrays helps you write clean and reliable PHP code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

PHP Arrays Code Example

PHP

<?php
$cars = ["Civic", "Corolla"];
$cars[] = "Alto";

$ages = ["Ali" => 25, "Sara" => 22];
$ages["Usman"] = 30;

$students = [
    ["name" => "Hina", "marks" => 91],
    ["name" => "Bilal", "marks" => 78],
];

echo count($cars) . " cars, first is $cars[0]<br>";
echo "Sara is {$ages['Sara']}<br>";
echo $students[1]["name"] . " scored " . $students[1]["marks"] . "<br>";
print_r($cars);

Output

3 cars, first is Civic
Sara is 22
Bilal scored 78
Array ( [0] => Civic [1] => Corolla [2] => Alto )

Run this example on your own computer. The "Get Started" lesson shows how to set it up.

PHP Arrays Practice Exercises

Check what you learned in “PHP Arrays”.

/ 2 solved

Fill in the blank

Count the items in an array.

echo ($cars);

✓ Correct! Not quite. Try again.

Multiple choice

What kind of array is ["Ali" => 25]?

Associative array Indexed array Object Tuple

✓ Correct! Not quite. Try again.

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PHP Arrays

💡 Key Takeaways: PHP Arrays

PHP Arrays Code Example

PHP Arrays Practice Exercises

Key Takeaways: PHP Arrays