How can the use of $GLOBALS in PHP lead to errors and why is it not recommended?

Using $GLOBALS in PHP can lead to errors because it makes variables global across the entire script, which can make code harder to debug and maintain. It can also make code less predictable and increase the risk of variable conflicts. It is not recommended to use $GLOBALS as a shortcut for passing variables between functions or including files. 

// Avoid using $GLOBALS and instead pass variables as function parameters or use classes and objects for better code organization

// Example of passing variables as function parameters
function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

$num1 = 5;
$num2 = 10;
$result = calculateSum($num1, $num2);
echo $result;

Keywords

$GLOBALS PHP variable scope global variables errors

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