In what ways can the use of meaningful variable names improve the overall structure and clarity of PHP code, as suggested by the forum user in response #2?

Using meaningful variable names can improve the overall structure and clarity of PHP code by making it easier for developers to understand the purpose and functionality of each variable. This can lead to better readability, maintainability, and easier debugging of the code.

// Bad variable names
$a = 10;
$b = 20;
$c = $a + $b;
echo $c;

// Good variable names
$firstNumber = 10;
$secondNumber = 20;
$sum = $firstNumber + $secondNumber;
echo $sum;