Global scope

[beingchinmay]

Variables declared outside a function are global. That is, they can be accessed from any part of the program. However, by default, they are not available inside functions. To allow a function to access a global variable, you can use the global keyword inside the function to declare the variable within the function. Here’s how we can rewrite the update_counter( ) function to allow it to access the global $counter variable:

Code:

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A more cumbersome way to update the global variable is to use PHP’s $GLOBALS array instead of accessing the variable directly:

Code:

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