PHP Interview Questions For Freshers
- Differentiate between variables and constants in PHP. …
- What is a session in PHP? …
- What does PEAR stands for? …
- Explain the difference between $message and $$message. …
- Is PHP a case-sensitive language? …
- What are the different types of variables present in PHP?
Beside this, What are the main topics of PHP?
Key topics:
- Variables and operators.
- Control structures, arrays and PHP array functions.
- External files.
- Functions, arguments, passing by reference, globals and scope.
- OOP in PHP4 and PHP5.
- MySQL database form PHP.
- SQLite.
- Sessions and Cookies.
Considering this, What is PHP in short answer? PHP is a recursive acronym for PHP Hypertext Preprocessor. It is a widely used open-source programming language especially suited for creating dynamic websites and mobile API’s.
What is PHP full form?
PHP is an acronym for “PHP: Hypertext Preprocessor” PHP is a widely-used, open source scripting language. PHP scripts are executed on the server. PHP is free to download and use.
Keeping this in consideration, Is PHP front end? PHP is a back end development language only. PHP belongs to the LAMP stack, which stands for Linux, Apache, MySQL, and PHP/Perl/Python. To develop a web app with this technology stack, a software engineer needs to know four different syntax systems, as well as HTML and CSS.
What are PHP functions?
PHP User Defined Functions
A function is a block of statements that can be used repeatedly in a program. A function will not execute automatically when a page loads. A function will be executed by a call to the function.
What is PHP and JavaScript?
PHP is server-side scripting language whereas Javascript is a client-side scripting language. PHP doesn’t execute within browser whereas Javascript executes within browser. PHP supports database whereas Javascript doesn’t support databases. PHP accepts both upper case and lower case variables while Javascript doesn’t.
What is PHP vs HTML?
PHP is a scripting language | HTML is a markup language. PHP code is executed on the server | HTML code is parsed by the client browser. PHP creates dynamic web pages | HTML creates static web pages. PHP can access a database | Database cannot be accessed using HTML.
Is PHP full stack?
A full stack developer has programming expertise to code for, both, the frontend and backend of a website. More specifically, it describes the range of “stacks” with which a developer uses in building a website. A LAMP stack stands for Linux, Apache, Mysql, and PHP. LAMP is one example of a full-stack.
What are parameters in PHP?
PHP Parameterized functions are the functions with parameters. You can pass any number of parameters inside a function. These passed parameters act as variables inside your function. They are specified inside the parentheses, after the function name.
Why echo is used in PHP?
The echo is used to display the output of parameters that are passed to it. It displays the outputs of one or more strings separated by commas. The print accepts one argument at a time & cannot be used as a variable function in PHP.
How many types of arrays are there in PHP?
In PHP, there are three types of arrays: Indexed arrays – Arrays with a numeric index. Associative arrays – Arrays with named keys. Multidimensional arrays – Arrays containing one or more arrays.
Is PHP a database language?
PHP is a fast and feature-rich open source scripting language used to develop Web Applications or Internet / Intranet Applications. MySQL is a powerful open source database server built based on a relational database management system (RDBMS) and is capable of handling a large concurrent database connection.
What type of programming language is PHP?
PHP (Hypertext Preprocessor)
PHP is an open-source scripting language designed for creating dynamic web pages that effectively work with databases. It is also used as a general-purpose programming language.
What is PHP Ajax?
AJAX = Asynchronous JavaScript and XML. AJAX is a technique for creating fast and dynamic web pages. AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.
What is CSS and PHP?
CSS represents the style and the appearance of content like font, color, margin, padding, etc. PHP is used for server-side programming which will interact with databases to retrieve information, storing, email sending, and provides content to HTML pages to display on the screen.
What is markup programming?
markup language, standard text-encoding system consisting of a set of symbols inserted in a text document to control its structure, formatting, or the relationship between its parts.
Who is a PHP developer?
A PHP developer is responsible for writing server-side web application logic. PHP developers usually develop back-end components, connect the application with the other (often third-party) web services, and support the front-end developers by integrating their work with the application.
What is front end and back end?
Front and back end developers work on different sides of a website. Front end development is programming which focuses on the visual elements of a website or app that a user will interact with (the client side). Meanwhile, back end development focuses on the side of a website users can’t see (the server side).
What does MERN stack?
MERN stands for MongoDB, Express, React, Node, after the four key technologies that make up the stack.
What is $_ POST in PHP?
PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method=”post”. $_POST is also widely used to pass variables. The example below shows a form with an input field and a submit button.
What is the array in PHP?
An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more.
How many types of functions are there in PHP?
Types of Functions in PHP. There are two types of functions as: Internal (built-in) Functions. User Defined Functions.
What is printf in PHP?
The printf() function outputs a formatted string. The arg1, arg2, ++ parameters will be inserted at percent (%) signs in the main string. This function works “step-by-step”.
What is tag PHP?
The tags tell the web server to treat everything inside the tags as PHP code to run. The code is very simple. It uses an in-build PHP function “echo” to display the text “Hello World …” in the web page. Everything outside these tags is sent directly to the browser.
What is an array PHP?
An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more.
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