12 questions for “Constants & Superglobals”

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PHP Constants & Superglobals 7

Information Technology

12 questions in 1 technology

#	Question	Technology	Topic	Level
1	What are PHP superglobals, and what are some of the most commonly used ones? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Beginner
2	How do you safely retrieve values from superglobals like $_GET or $_POST to avoid undefined index errors and potential security issues? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Intermediate
3	What is the difference between class constants and global constants, and how do you define and access a constant within a class? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Intermediate
4	How do enums, introduced in PHP 8.1, provide a more type safe alternative to using class constants for representing a fixed set of related values? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Advanced
5	What security risks are associated with directly trusting values from superglobals like $_SERVER, and how should applications guard against header spoofing? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Advanced
6	What is a constant in PHP, and how does it differ from a regular variable? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Beginner
7	How does the $_SERVER superglobal provide useful information about the current request and server environment? PHP › Constants & Superglobals	PHP	Constants & Superglobals	Intermediate
8	How do you retrieve data submitted through an HTML form using PHP, and what is the difference between the GET and POST methods? PHP › Form Handling & Validation	PHP	Form Handling & Validation	Beginner
9	What is the purpose of validating user submitted form data, and what basic validation checks are commonly performed? PHP › Form Handling & Validation	PHP	Form Handling & Validation	Beginner
10	What is the match expression introduced in PHP 8, and how does it improve upon the traditional switch statement? PHP › PHP 8 Features (Attributes, Enums, Match, Nullsafe Operator)	PHP	PHP 8 Features (Attributes, Enums, Match, Nullsafe Operator)	Beginner

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