Author: admin
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Variables
A variable in PHP is a named memory location that holds data belonging to one of the data types. Variables are assigned with the “=” operator, with the variable on the left hand side and the expression to be evaluated on the right. No Need to Specify the Type of a Variable PHP is a…
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How many types of API functions are available in Node.js?
There are two types of API functions in Node.js:
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What do you understand by the term I/O?
The term I/O stands for input and output. It is used to access anything outside of your application. The I/O describes any program, operation, or device that transfers data to or from a medium or another medium. This medium can be a physical device, network, or files within a system. I/O is loaded into the…
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Comments
A comment in any computer program (such as a PHP program) is a certain explanatory text that is ignored by the language compiler/interpreter. Its purpose is to help the user understand the logic used in the program algorithm. Although placing comments in the code is not essential, it is a highly recommended practice. The comments…
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Hello World
Conventionally, learners write a “Hello World” program as their first program when learning a new language or a framework. The objective is to verify if the software to be used has been installed correctly and is working as expected. To run a Hello World program in PHP, you should have installed the Apache server along…
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Explain Node.js web application architecture?
A web application distinguishes into 4 layers:
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Syntax
The syntax rules of PHP are very similar to C Language. PHP is a server side scripting language. A PHP code is stored as a text file with “.php” extension. A “.php” file is essentially a web page with one or more blocks of PHP code interspersed in the HTML script. However, it must be…
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Features
PHP (Hypertext Preprocessor) is an open-source server-side scripting language primarily used for web development. PHP can be embedded into HTML code. PHP is mainly used for server-side scripting, which runs scripts on the web server and then forwards the HTML they process to the web browser on the client. This makes it possible for programmers…
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What are the advantages of Node.js?
Following are the main advantages of Node.js:
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History
PHP started out as a small open-source project that evolved gradually as more and more people found out how useful it was. Rasmus Lerdorf released the first version of PHP way back in 1994. At that time, PHP stood for Personal Home Page, as he used it to maintain his personal homepage. Later on, he…