What are the main characteristics of a PHP variable?

Following are some of the most important aspects of the usage of variables in PHP:

• Variables can be declared before the value assignment.
• A variable value assignment happens using the ‘=’ operator.
• Every variable in PHP is denoted with a $ (dollar) sign.
• The value of a variable depends on its latest assigned value.
• PHP variables are not intrinsic. There is no explicit declaration.

Next up on these PHP interview questions for freshers, you need to understand what NULL is.