Does every PHP code snippet inside the <?php> tag have its own variable scope?

Question

If yes is there any way to access a var defined in another PHP code snippet tag?

Answer 1

No, they don't. Separate <?php ?> tags share the same variable scope. You can access any variable declared from any scope:

<?php $foo = 4; ?>
<?php echo $foo; /* will echo 4 */ ?>

The only scoping notion in PHP exists for functions or methods. To use a global variable in a function or a method, you must use the $GLOBALS array, or a global $theVariableINeed; declaration inside your function.