What are the characteristics of PHP variables?

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☛ Here are the most important things to know about variables in PHP.
☛ All variables in PHP are denoted with a leading dollar sign ($).
☛ The value of a variable is the value of its most recent assignment.
☛ Variables are assigned with the = operator, with the variable on the left-hand side and the expression to be evaluated on the right.
☛ Variables can, but do not need, to be declared before assignment.
☛ Variables in PHP do not have intrinsic types - a variable does not know in advance whether it will be used to store a number or a string of characters.
☛ Variables used before they are assigned have default values.
☛ PHP does a good job of automatically converting types from one to another when necessary.
☛ PHP variables are Perl-like.
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