Learning PHP 7 (Video 5)

This video tutorial introduces PHP variables, explaining their types, declaration rules, and type juggling. It covers constants, their immutability, and the use of operators for variable manipulation. The tutorial emphasizes the importance of variables in programming and provides examples of different variable types and operations.

What is the correct way to start a variable name in PHP?

• With a number

• With a space

• With a special character

• With a letter or underscore

Which of the following is a characteristic of PHP as a loosely typed language?

• Variables must be declared with a specific type

• PHP does not support type conversion

• PHP automatically converts variables to the correct data type

• Variables cannot change type once declared

What is the result of adding two string variables containing numeric values in PHP?

• An error is thrown

• The result is a boolean

• The strings are converted to integers and summed

• The strings are concatenated

What is a constant in PHP?

• A variable that must start with a number

• A variable that can change during script execution

• A variable that is case insensitive

• A value that cannot change during script execution

Which operator is used for string concatenation in PHP?

• .

• &

• +

• *