Topic: Fundamental

Create PHP UUIDS: 3 Best Options with Code Examples (2023)

UUIDs (Universally Unique Identifiers) are essential for creating unique identifiers in PHP applications. They help you manage unique resources, database records, and communication between systems. Let's learn how to create UUID in PHP. In this article, we will compare various methods of generating UUIDs in PHP, including code examples, to help you choose the best approach for your project. Comparison Table for Creating UUIDs in PHP Options MethodComplianceSecurity & UniquenessVersatilityEase of ImplementationDependenciesProsConsPHP Built-in FunctionsModerateModerateLowEasyNoneEasy to implement, no dependenciesLimited versatility, less compliant, less secureramsey/uuid PackageHighHighHighModerateExternal LibraryCompliant, secure, versatileRequires external library, additional dependenciesCustom UUID Generation FunctionCustomizableCustomizableCustomizableVariesNone (if applicable)Tailored to project requirements, full controlTime-consuming, requires testing, may be less compliant Article Highlights UUIDs in PHP applications: UUIDs are essential for unique identification in various applications, such as database management, API communication, and tracking user activities. PHP built-in functions: Functions like uniqid(), random_bytes(), and bin2hex() provide a quick and easy way to generate unique identifiers…

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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…

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How to Validate Phone Numbers Using PHP | Code Examples 2023

Phone number validation is an important aspect of many web applications, especially those that involve user input. It ensures that the phone number entered by the user is valid and can be used for various purposes like sending SMS, making phone calls, or storing in a database. In this article, we will explore different methods of validating phone numbers in PHP and the pros and cons of each method. How to Validate Phone Numbers in PHP In this article, we will explore three methods of validating phone numbers in PHP and discuss the best practices to follow to ensure your application is robust and reliable. We will also answer frequently asked questions about phone number validation to help you better understand this crucial aspect of web application development. PHP Validate Phone Numbers Code Example <?php require_once 'vendor/autoload.php'; use libphonenumber\PhoneNumberUtil; use libphonenumber\PhoneNumberFormat; $phone_number = "123-456-7890"; $phoneUtil = PhoneNumberUtil::getInstance(); try { $numberProto…

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PHP Single vs Double Question Mark: Difference & Code Examples

Difference between single vs double question mark in PHP The single question mark is used for a ternary operator for simple if / then statements, whereas the double is used for null coalescing. The double question mark will return the first non-null value. You can run multiple instances of the double question mark in a single statement if there's a chance you have multiple null values. Now, let's discuss PHP single double question mark starting from the code example. Single vs Double Question Mark PHP Code Example // /// Single Question Mark Ternary Example // $iLikeCats = false; echo $iLikeCats ? 'Yes, cats are awesome!' : 'No way, I can't stand cats!'; // output: 'No way, I can't stand cats!'; /// Double Question Mark Null Coalescing Example // $userName = null; $defaultName = 'Guest'; $displayName = $userName ?? $defaultName; echo $displayName; // Output: Guest This article aims to provide a…

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Calculate difference between 2 dates, times | PHP Code Examples

In this article, we will learn how to calculate the difference between two dates and time in PHP. We will also understand its implementation through the examples. Let's explore different methods through which we will find the difference between 2 dates and times in PHP. In examples, we will give two dates, start_date and end_date, and we will find the difference between these two dates. Calculate the Difference Between 2 Dates in PHP Code Example <?php // Creates DateTime objects. $datetime1 = date_create('2015-07-01'); $datetime2 = date_create('2022-11-12'); // Calculates the difference between DateTime objects. $interval = date_diff($datetime1, $datetime2); // Prints the result in years and months format. echo $interval->format('%R%y years %m months'); Table of Contents In this article, we will cover the following sections. Using date_diff() Function in PHP Using the Date-time Mathematical Formula in PHP. Calculate the number of days between two dates in PHP? Calculate the Number of Hours…

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PHP Array Types: What are They with PHP Code Examples (2023)

types of arrays in PHP
What are the Types of Arrays in PHP Arrays are the fundamental data types for storing multiple values. All programming languages feature an array as the core data type, with slight variations. For instance, Java keeps the same data type values in an array. An array in PHP is more flexible in terms of the data types as it can store mixed types in an array. There are three different types of arrays in PHP. Indexed array PHP Associative array PHP Multidimensional array PHP This article overviews these types of arrays in PHP with examples. Besides the types, the article includes additional sections related to the PHP array. So, there is a lot of ground to cover, and that’s why it’s time to move on to the main subject. As seen earlier, the array in PHP is one of the three types. Let’s start with the indexed array PHP. #1…

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What is a PHP Associative Array Hash Map: 5 Code Examples

associative array or hashmap in PHP
Using associative array hash maps in PHP Before seeing an associative array or hash map in PHP, let’s first learn some generic data structures. Array An array is a standard data structure in programming. Unlike a variable, an array can store many values of the same or mixed data types. Every programming language features the array data structure at its core, with slight modifications. For instance, typically, Java does not allow mixed data types in an array, but PHP and Javascript do. Hash maps also store many values but go an extra mile. How so? Hash Map Similarly, a hash map is a data structure that associates a unique identifier to a value. In more precise terms, it keeps “KEY-VALUE” pairs. The key and the value can have the same or different data types. These keys are meant for accessing the values. In the case of an array, every programming…

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What is PHP echo?

PHP echo
PHP echo outputs one or more strings to the screen. It is not a function but a language construct that is frequently used in PHP. Generally, its syntax looks like echo(string …$expression) : void Here are some important points about PHP echo. We do not use parenthesis around the $expression arguments. In the syntax above, it is just there to show the expected arguments.echo doesn’t have a return value.It coerces the non-string value to string and prints it to the screen. That’s why it raises a warning for an array because PHP doesn’t coerce an array to a string. Here’s an example of an echo with more than one argument. This usage is relatively uncommon. <?php //OUTPUT: Hello World echo "Hello ","World"; ?> Now, as we’ve seen what is echo in PHP, we’ll explore it more with examples. #1  - Printing string with PHP echo PHP echo takes one or…

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What is isset in PHP and When to use it?

What is isset in PHP and do I need to use it?
What is isset and how to use it in your PHP code isset() is a php function that checks whether a variable, element, or property has been set and exists. It helps prevent bugs that occur when trying to reference a key that doesn't exist. In my opinion, isset is one of those annoying PHP functions that has grown a love / hate relationship on me. It is a necessary function in PHP that has prevented many errors and saved so many headaches, but it is also annoying because other languages have better ways of handling the existence of an element. The end result is an if statement that is large and harder to read but more complete. Scenario: Checking whether an element exists inside of an array In the following example, I am getting a multidimensional array back from my restful API. Check to see if you are able…

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How to comment out code in PHP

how to comment out code in PHP
Commenting out your PHP Code There are 2 methods to commenting out your PHP. You can add double slashes // some code here to the beginning of each line, or you can wrap the entire code in a docblock /** some code here **/. I prefer the double slashes approach because it gives you more control. Do you ever need to know how to comment out your PHP code because something appears to be broken, but you don't know what? Commenting out code is a good way to test new logic without completely removing old logic that you're not quite ready to delete. Option 1: Using docblocks to comment out sections of PHP code A common way to comment out code in PHP is to use docblocks around the code. You surround the code in the following syntax /** {code here} **/ and it will comment out everything inside of…

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