How can php be used

For example, if you complete a form on a website and submit it, or click a link to a web page written in PHP, no actual PHP code runs on your computer. Instead, the form data or request for the web page gets sent to a web server to be processed by the PHP scripts. The web server then sends the processed HTML back to you which is where 'Hypertext Preprocessor' in the name comes from , and your web browser displays the results.

PHP is an interpreted language. This means that when you make changes to your source code you can immediately test these changes, without first needing to compile your source code into binary form. Skipping the compilation step makes the development process much faster. The advantage of using a framework is that. Also, PHP statements end with a semicolon ;. However, all variable names are case sensitive.

PHP has several special keywords that, while they are "valid" variable names, cannot be used for your variables. The reason for this is that the language itself has already defined those variables and they have are used for special purposes. Several examples are listed below, for a complete list see the PHP documentation site. Booleans are often used in conditional testing.

Null is a special data type that can only have the value null. Variables can be declared with no value or emptied by setting the value to null. Also, if a variable is created without being assigned a value, it is automatically assigned null. A class is a data structure useful for modeling things in the real world, and can contain properties and methods. Objects are instances a class, and are a convenient way to package values and functions specific to a class.

A resource is a special variable, holding a reference to an external resource. Resources are created and used by special functions. You can use get resource type function to see resource type. A string is series of characters. These can be used to store any textual information in your application.

Double quoted strings also allow escape sequences. These are special codes that put characters in your string that represent typically invisible characters. You can also embed PHP variables in double quoted strings to have their values added to the string. First of all, you must have PHP installed on your local machine.

In my case, it is wamp Create a folder right there and name it whatever you want, then open up the folder with your code editor. Your statements, apart from the last one, must also be terminated by a semi-colon. PHP remains a relevant and widely-used language in web development.

So, PHP doesn't seem to be going anywhere anytime soon. If you read this far, tweet to the author to show them you care. Tweet a thanks. Learn to code for free. Get started. Forum Donate. Kolade Chris. Advantages of PHP PHP has some advantages that have made it so popular, and it's been the go-to language for web servers for more than 15 years now.

Is PHP Dying? It is powerful enough to be at the core of the biggest blogging system on the web WordPress! It is deep enough to run large social networks! It is also easy enough to be a beginner's first server side language!

You can output images, PDF files, and even Flash movies. PHP scripts are executed on the server. The output is returned in form of HTML. Skip to content. Report a Bug. Previous Prev. Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand.