- HTML: HTML (HyperText Markup Language) is used for creating the structure of web pages and is not used for server-side scripting.
- CSS: CSS (Cascading Style Sheets) is used for styling the web pages and is not used for server-side scripting.
- PHP: PHP (Hypertext Preprocessor) is a widely used server-side scripting language. It is commonly used to develop dynamic web pages and interact with databases.
- JavaScript: JavaScript is typically used for client-side scripting. It runs in the user's browser to provide dynamic and interactive features, but it can also be used server-side with Node.js.
Therefore, the correct answer is 3. PHP.
A Session variable is created ________.
Cascading Style Sheets define style and appearance using ________.
The surface integral \( \int_S x^2 \, dS \) over the upper hemisphere
\[ z = \sqrt{1 - x^2 - y^2} \]
with radius 1 is ..........