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Variable Variables with Classes - PHP

Quite possibly one of PHP’s least utilized yet most valuable features is its support for Variable Variables. In short these are a method of using the value of one variable to call the name of another. Sound confusing? We'll explain everything...

  1. Using Variable Variables in PHP
  2. Variable Variables?
  3. Using Variable Variables with Arrays
  4. Variable Variables with Functions
  5. Variable Variables with Classes
  6. The Never-ending Variable
  7. Conclusion
By: Eric Seufert
Rating: starstarstarstarstar / 15
February 14, 2001

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Variable Variables work equally well with class objects, the basic syntax of which is almost the same as the use of variable variables with functions. Set the class name into a variable, call the variable variable of that variable and you then have access to variables within that class. Here’s an example:

class Eric { var $foo = "bar"; } $Eric = new Eric; $v = "Eric"; echo $$v->foo;

the output of which would be:


>>> More PHP Articles          >>> More By Eric Seufert

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