In the context of PHP programming, how can global variables be properly defined and utilized to prevent parse errors in scripts?

Global variables in PHP should be properly defined using the `global` keyword within functions to access them. This prevents parse errors by ensuring that the variable is declared in the global scope before being used within a function. By declaring the variable as global within the function, PHP knows to look for the variable in the global scope. 

$globalVar = "Hello, world!";

function myFunction() {
    global $globalVar;
    echo $globalVar;
}

myFunction();

Keywords

global variables PHP programming parse errors define utilize

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