How can developers troubleshoot and resolve issues related to variable scope and initialization in PHP scripts?

To troubleshoot and resolve issues related to variable scope and initialization in PHP scripts, developers should ensure that variables are declared in the correct scope (global, local, static) and properly initialized before use. They can use functions like `global` to access global variables within a function, `static` to retain variable values between function calls, and `isset` to check if a variable is initialized.

// Example of using global keyword to access global variable within a function
$globalVar = 10;

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

testGlobalVar(); // Output: 10