What is the potential impact of inconsistent variable casing in PHP code?

Inconsistent variable casing in PHP code can lead to confusion and errors, as PHP is case-sensitive. To prevent this issue, it is important to maintain consistent casing for all variable names throughout the codebase. This can be achieved by following a naming convention, such as using camelCase or snake_case for variable names.

// Inconsistent variable casing
$myVariable = "Hello";
echo $MyVariable; // This will result in an error

// Consistent variable casing
$myVariable = "Hello";
echo $myVariable; // This will output "Hello"