What are some best practices for structuring PHP code to avoid errors related to variable scope and timing of array initialization?

When dealing with variable scope and timing of array initialization in PHP, it's important to properly define variables within the appropriate scope and ensure that arrays are initialized before being accessed or modified. One way to avoid errors related to variable scope is to use the global keyword to access variables defined outside of a function. Additionally, initializing arrays before using them can help prevent undefined index errors. 

// Example of using the global keyword to access variables
$globalVar = "I am a global variable";

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

testScope();

// Example of initializing an array before using it
$myArray = [];

$myArray[] = "First element";
$myArray[] = "Second element";

print_r($myArray);

Keywords

PHP variable scope array initialization timing errors

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