PHP $ and $$ VariablesThe $var (single dollar) is a normal variable with the name var that stores any value like string, integer, float, etc. The $$var (double dollar) is a reference variable that stores the value of the $variable inside it.To understand the difference better, let's see some examples. Example 1Output: In the above example, we have assigned a value to the variable x as abc. Value of reference variable $$x is assigned as 200. Now we have printed the values $x, $$x and $abc. Example2Output: In the above example, we have assigned a value to the variable x as U.P. Value of reference variable $$x is assigned as Lucknow. Now we have printed the values $x, $$x and a string. Example3Output: In the above example, we have assigned a value to the variable name Cat. Value of reference variable ${$name} is assigned as Dog and ${${$name}} as Monkey. Now we have printed the values as $name, ${$name}, $Cat, ${${$name}} and $Dog. Next TopicPHP Constants |
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