Aamir Khan, Author at Crafty Techie

PHP Data Structures: A Beginner’s Guide to Get Started | 2023

PHP Data Structures This article is a comprehensive overview of data structures along with basic code examples in PHP. The article overview the following six fundamental data structures: Array. Linked list. Stack. Queue. Tree. Graph. So, let’s begin our journey with the most fundamental and important aspects of computer science and programming - Data structures. Article Highlights Following are some important highlights from the article. A data structure is a way of organizing, managing, and storing data in a computer. Different types of data structures differ in terms of storage and retrieval patterns. Choosing the right data structure can greatly improve the efficiency and performance of a program. Data structures can be broadly classified into linear and non-linear classes. An algorithm is a set of well-defined steps or instructions to solve a problem. An array is a linear data structure consisting of a collection of elements. An index or a…

Using AWS Copilot: Beginner’s Guide to Container Deployment

AWS Copilot is a command-line interface tool that simplifies containerized application deployment on Amazon Elastic Container Service (ECS). It is a tool designed to make the deployment process more straightforward and faster, especially for new ECS users who want to move beyond the manual management of lower-level infrastructure. AWS Copilot enables developers to focus more on developing high-quality applications and less on worrying about the underlying infrastructure. By automating many of the complex infrastructure and deployment tasks, Copilot creates modern application deployments based on production-ready patterns that include best practices designed by ECS engineers and customers over the years. This article will discuss AWS Copilot's features, use cases, fundamental concepts, and deployment process, and how it addresses pain points associated with manual deployment. AWS Copilot | Deploy Application with One Command Run the following command to deploy your containerized application to AWS ECS using AWS Copilot. $ git clone [REPOSITORY…

Send SMS Using PHP: 3 Best Options With Code Examples (2023)

How to Send SMS using PHP SMS (Short Message Service) is a popular communication channel that allows businesses to interact with customers in real time. It is widely used for notifications, alerts, authentication, and marketing. Integrating SMS functionality into PHP applications can be valuable to any web-based business. This article will explore different ways to send SMS using PHP. We will look at two options: sending SMS using SMTP in PHP and SMS using APIs in PHP. We will also explore three popular SMS APIs that can be used with PHP: Twilio, AWS SNS, and Clickatell. Finally, we will examine some alternative SMS APIs for sending SMS messages. Comparison Chart | Send SMS using PHP Here’s a quick comparison between Twilio, AWS SNS, and ClickaTell. FeaturesTwilioAWS SNSClickaTellSupported countries150+200+200+API simplicityHighMediumHighCost-effectivenessMediumHighMediumTwo-factor authenticationYesYesYesDelivery statusYesYesYesMultiple messaging channelsYesYesYesAnalyticsYesYesYesPersonalizationYesYesYesShortcodesYesYesYesScalabilityHighHighHighCustomer support24/724/724/7 Article Highlights Two options to send SMS are using SMTP servers or SMS APIs. SMTP is…

Use the Abstract Factory Pattern | PHP Code Examples in 2023

Using the Abstract Factory Pattern in PHP The Abstract Factory Pattern is a creational design pattern that provides an interface for creating families of related or dependent objects without specifying their concrete classes. The pattern encapsulates the creation of objects within a factory object, which is responsible for creating the appropriate objects based on the parameters passed to it. The Abstract Factory Pattern is useful in situations where there is a need to create families of related objects that work together seamlessly, but the specific types of objects to be created are not known until runtime. Using an abstract factory to create the objects, the client code can be decoupled from the concrete classes that implement the objects, allowing for greater flexibility and extensibility of the software system. Article Highlights The Abstract Factory Pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes.…

5 PHP Template Engines Compared with Code Examples (2023)

PHP Template Engines: Quick Comparison The following table compares PHP template engines we will see in this article. FeatureTwigMustacheBladeVoltSmartySyntax{{ }}{{ }}{{ }}{{ }}{$}Control structuresYesLimitedYesYesYesInheritanceYesNoNoYesYesCommunityLargeLargeLargeMediumMediumDocumentationExtensiveGoodGoodLimitedGoodPerformanceGoodGoodGoodFastGood Keep in mind that the "best" PHP templating engine for you will depend on your specific needs and preferences. We recommend trying out a few different options and seeing which one works best for your project. Wanna learn which ones are the best for you? Continue reading the article, and by the end of it you will have more clarity. Article Highlights A PHP templating engine allows you to separate your presentation and business logic. They can improve reusability, collaboration, and maintenance and provide greater flexibility than traditional PHP code. Twig, Mustache, Blade, Volt, and Smarty are some of today's best PHP templating engines. Twig is a popular, flexible, and feature-rich templating engine that offers advanced control structures, inheritance, and sandboxing capabilities. Mustache is a simple,…

PHP Class Constants: Tutorial with Code Examples (2023)

What is a PHP Class Constant? PHP class constant is a value defined within a class and cannot be changed during the execution of the script. They are similar to variables, but unlike variables, their value remains constant throughout the script execution. In object-oriented programming, class constants are used to define data that belongs to a class rather than a specific instance of a class. They offer several advantages, such as better code readability and centralized data management. PHP Class Constant Code Example <?php class Math { public const PI = 3.14159265359; public static function areaOfCircle($radius) { return self::PI * $radius * $radius; } public static function circumferenceOfCircle($radius) { return 2 * self::PI * $radius; } } echo Math::areaOfCircle(5); // Output: 78.539816339744 echo Math::circumferenceOfCircle(5); // Output: 31.4159265358979 ?> Article Highlights Class constants are immutable values that are associated with a specific class in PHP. Class constants are declared using the…

Read Excel Files in PHP: 3 Options with Code Examples (2023)

If you are working with data, you might have come across Excel files that need to be imported and manipulated in your PHP application. There are several PHP libraries available that allow you to read Excel files. In this article, we'll cover three popular libraries: SimpleXLSX PhpSpreadsheet Spout Quick Comparison The following table provides a quick overview of the key features and differences between the three libraries. FeatureSimpleXLSXPhpSpreadsheetSpoutFile FormatsXLSX, XLSXLSX, XLS, CSVXLSX, CSVAdvanced FeaturesBasicAdvancedBasicReading EfficiencyGoodMediumExcellentWriting EfficiencyGoodMediumExcellentAPI ComplexitySimpleAdvancedSimpleMaintenanceLowHighMediumDocumentationBasicComprehensiveBasic Read Excel Files in PHP Code Examples Read Excel Files in PHP with SimpleXLSX <?php require 'vendor/autoload.php'; use PhpOffice\PhpSpreadsheet\IOFactory; $spreadsheet = IOFactory::load('example.xlsx'); $worksheet = $spreadsheet->getActiveSheet(); $data = $worksheet->toArray(null, true, true, true); print_r($data); ?> Read Excel Files in PHP with PhpSpreadsheet <?php require 'vendor/autoload.php'; use PhpOffice\PhpSpreadsheet\IOFactory; $spreadsheet = IOFactory::load('example.xlsx'); $worksheet = $spreadsheet->getActiveSheet(); $data = $worksheet->toArray(null, true, true, true); print_r($data); ?> Read Excel Files in PHP with Spout <?php require_once('vendor/autoload.php'); use Box\Spout\Reader\Common\Creator\ReaderEntityFactory; $reader = ReaderEntityFactory::createXLSXReader();…

PHP Dependency Injection Tutorial + 3 Code Examples 2023

Dependency Injection PHP Tutorial Dependency injection is a popular design pattern used in modern programming languages to promote code reusability, maintainability, and testability. It allows developers to manage object dependencies and decouples classes from their dependencies, making them more flexible and easier to manage. This article is part of our larger series on using Object-Oriented Programming (OOP) in PHP. Click here to start from the beginning. In this article, we will discuss what dependency injection is, how it can be used in PHP, and the different types of dependency injection available. Dependency Injection PHP Code Example <?php require 'vendor/autoload.php'; use DI\ContainerBuilder; // Instantiate container builder $builder = new ContainerBuilder(); // Configure container $builder->addDefinitions([ UserController::class => function ($container) { return new UserController( $container->get(UserService::class) ); }, UserService::class => function ($container) { return new UserService(); }, ]); // Build container $container = $builder->build(); class UserService { public function createUser(array $data) { // validate…

Remove Null Values from a PHP Array: 5 Code Examples (2023)

How to Remove Null Values from an Array in PHP Use the unset() & is_null() functions to remove null values from a PHP array. You can also use the type check operator "===" as an alternative to the is_null function. You can check for false or use the empty() function if you need to remove any empty value, including nulls. Removing Null Values from PHP Arrays Code Example <?php $array = array('hello', null, 'world', null); foreach ($array as $key => $value) { if ($value === null) { unset($array[$key]); } } print_r(array_Values($array)); // Output: Array ( [0] => hello [1] => world ) ?> Functions to Check for null & empty values in PHP Function/MethodDescriptionisset()Determines if a variable is set and is not null. Returns true if the variable exists and has a value other than null, and false otherwise.empty()Determines if a variable is considered empty. Returns true if the variable…

Write to PHP Log Files Easily: 5 Code Examples (2023)

How to Write to Log Files in PHP When developing applications in PHP (any language), logging is an essential tool for tracking what happens in the code. By logging errors, warnings, and other important information, developers can: Identify and diagnose application issues, making locating and fixing bugs or errors easier. Detect security breaches or attacks, such as unusual login attempts or suspicious network activity. Identify performance issues in applications or systems, such as slow queries or memory leaks. Ensure compliance with regulatory requirements or internal policies. For example, financial institutions may be required to log all financial transactions for audit purposes. Track user activity or system changes, making storing, monitoring, and auditing user behavior or system changes easier. This article will discuss some of the most common PHP methods for writing to log files. PHP Error Logging Code Example <?php use Monolog\Logger; use Monolog\Handler\StreamHandler; function divide_numbers($numerator, $denominator) { try {…

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