Zappi PHP Developer Interview Questions and Answers

Echo and print are both used to output data in PHP, but echo is slightly faster and can take multiple arguments.

• Echo is a language construct, while print is a function.

• Echo does not return a value, while print returns 1.

• Echo can output multiple strings separated by commas, while print can only output one string.

• Echo is generally preferred for performance reasons.

Array types and functions

• PHP arrays can store multiple values of different types

• Arrays can be indexed numerically or with strings

• Common array functions include count(), sort(), and array_push()

• Example: $fruits = ['apple', 'banana', 'orange'];

JavaScript is a programming language used for client-side scripting, while jQuery is a library built on top of JavaScript.

• JavaScript is a programming language that allows you to create dynamic web content and interact with the user.

• jQuery is a library that simplifies JavaScript programming by providing pre-written functions and methods.

• JavaScript is a core language, while jQuery is a framework built on top of JavaScrip...read more

Functions in MySQL are predefined or user-defined routines that perform specific tasks.

• MySQL functions can be used to manipulate data, perform calculations, and format output.

• There are various types of functions in MySQL, such as string functions, numeric functions, date and time functions, etc.

• Examples of MySQL functions include CONCAT(), SUBSTRING(), COUNT(), AVG(), NOW(), etc.