PHP Arrays and Functions: Working with Data

Master PHP arrays and functions. Learn indexed arrays, associative arrays, array functions, and how to create reusable functions in PHP.

Sarah Johnson

December 19, 2025

0.0k0

Arrays and functions are essential PHP concepts. They help you organize data and create reusable code. Let's master them.

PHP Arrays

Arrays store multiple values in a single variable. PHP has indexed arrays (numeric keys) and associative arrays (string keys). Both are powerful and commonly used.

Array Functions

PHP provides many built-in array functions - count, sort, array_push, array_pop, array_merge, and more. These make working with arrays easy and efficient.

Creating Functions

Functions let you write code once and use it multiple times. They make your code cleaner, easier to test, and more maintainable.

Function Parameters

Learn how to pass data to functions, use default parameters, and return values. Understanding parameters is key to writing good functions.

Built-in PHP Functions

PHP has thousands of built-in functions for strings, dates, files, databases, and more. Knowing the most useful ones saves time and makes coding easier.

#PHP#Arrays#Functions#Data Structures

Common Questions & Answers

What are the different types of arrays in PHP?

PHP has indexed arrays (numeric keys starting from 0) and associative arrays (string keys). Both can be created with array() or []. You can mix types in arrays. Use foreach to iterate through arrays.

php

Run Explain

<?php
$fruits = ["Apple", "Banana", "Orange"];
echo $fruits[0];

$person = [
    "name" => "John",
    "age" => 30,
    "city" => "New York"
];
echo $person["name"];

foreach ($fruits as $fruit) {
    echo $fruit . "<br>";
}

foreach ($person as $key => $value) {
    echo "$key: $value<br>";
}