What role does variable naming play in improving code clarity and understanding, especially when seeking help or collaborating with other developers?

Variable naming plays a crucial role in improving code clarity and understanding. Clear and descriptive variable names can make it easier for other developers to understand the purpose of each variable and the overall logic of the code. When seeking help or collaborating with other developers, meaningful variable names can facilitate communication and make it easier to troubleshoot issues or make changes to the code.

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

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