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The following are some of the most important characteristics of PHP variables:
1.A leading dollar symbol ($) is used to denote all variables in PHP.
2.A variable’s value is the result of its most recent assignment.
3.The = operator is used to assign variables, with the variable on the left and the expression to be evaluated on the right.
4.Variables can be stated before the assignment, although they are not required.
5.Variables in PHP don’t have inherent types, which means they don’t know if they’ll be used to store a number or a string of characters before they’re used.
6.Variables with default values are those that are utilized before they are assigned.