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PHP
Articles by Alok Prasad
Page 3 of 3
Compare define() vs const in PHP
As we know both define() and const are used to declare a constant in PHP script.SyntaxLet's discuss the difference between these two.The basic difference between these two is that const defines constants at compile time, whereas define() defines them at run time.We can't use the const keyword to declare constant in conditional blocks, while with define() we can achieve that.const accepts a static scalar(number, string or other constants like true, false, null, __FILE__), whereas define() takes any expression.consts are always case sensitive, whereas define() allows you to define case insensitive constants by passing true as the third argument.const can also ...
Read MoreWhat are getters and setters methods in PHP?
In this article, we learn the best way to create getter and setter strategies in PHP. Getter and setter strategies are utilized when we need to restrict the direct access to the variables by end-users. Getters and setters are methods used to define or retrieve the values of variables, normally private ones.Just as the name suggests, a getter method is a technique that gets or recovers the value of an object. Also, a setter method is a technique that sets the value of an object.ExampleLet's understand the use of getter and setter methods through an example.Output:PHP Error Cannot access private ...
Read MoreWhat is method overloading in PHP?
Method Overloading is a concept of Object Oriented Programming which helps in building the composite application in an easy way. Function overloading or method overloading is a feature that permits making creating several methods with a similar name that works differently from one another in the type of the input parameters it accepts as arguments.The above concept is fine for other programming languages and it is called static polymorphic i.e method overloading.ExampleLet's understand through an example.Output:ErrorExplanation:This will generate an error since php will say you have declared this method twice.But Other programming languages says , doTask($var1) and doTask($var1, $var2) are ...
Read MoreComparison of floating point values in PHP.\\n
In PHP, testing floating point values for equality is problematic, because PHP is failing when checking if one floating point number is equal to another. Despite the fact floating point numbers seems to have the same value do not need to actually be identical. So in this article will demonstrate the problem we are facing in comparison of Floating-Point Numbers and different procedures to avoid this problem.ExampleLet's test this with a simple example:output:a and b are not same.Explanation:In this code, the else condition is executed instead of the if condition, even though $a and $b are the same. It is ...
Read MoreExplain include(),require(),include_once() and require_once() functions in PHP.
In this article, we will learn about useful and important functions in PHP for file inclusion. All these functions require, require_once, include and include_once are utilized to include the files in the php page but there is a slight distinction among them in terms of functionality.Let's discuss these functions below with their functionality.include() :This function is used to include a file in a PHP page. If include() function is not able to find a specified file on location at that time it will throw a warning message however, it will not stop script execution.require():This function is utilized to add a ...
Read MoreComparison of dates in PHP
Matching two dates in PHP is quite smooth when both the dates are in a similar format but php failed to analyze when the two dates are in an unrelated format. In this article, we will discuss different cases of date comparison in PHP. We will figure out how to utilize DateTime class, strtotime() in comparing dates.Case 1:we can analyze the dates by simple comparison operator if the given dates are in a similar format.Output:2019-03-26 is latest than 2018-11-24Explanation:Here we have declared two dates $date1 and $date2 in the same format. So we have used a comparison operator(>) to compare ...
Read MoreConvert object to an array in PHP.
In a PHP application, we are working with data in various formats such as string, array, objects or more...In a real-time application, we may need to read a php object result in the form of an associative array to get the desired output.So we will discuss here how to transform a php object to an associative array in PHP.Let's explain what is an object and associative array in PHP? An object is an instance of a class meaning that from one class you can create many objects. It is simply a specimen of a class and has memory allocated. While ...
Read MoreExplain Polymorphism in PHP.
To begin with, Polymorphism is gotten from the Greek words Poly (which means many) and morphism (which meaning forms).Polymorphism portrays an example in object-oriented programming where methods in various classes that do similar things should have a similar name. Polymorphism is essentially an OOP pattern that enables numerous classes with different functionalities to execute or share a commonInterface. The usefulness of polymorphism is code written in different classes doesn't have any effect which class it belongs because they are used in the same way. In order to ensure that the classes do implement the polymorphism guideline, we can pick between ...
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