Are there any best practices for handling variables in PHP to avoid memory leaks?

Memory leaks in PHP can occur when variables are not properly unset or cleared, leading to unnecessary memory usage. To avoid memory leaks, it is important to unset variables when they are no longer needed, especially in loops or functions where variables are frequently created and destroyed. Additionally, using PHP's garbage collection mechanism can help in managing memory efficiently.

// Example of unsetting variables to avoid memory leaks
$variable1 = "Hello";
$variable2 = "World";

// Perform operations with variables

// Unset variables when they are no longer needed
unset($variable1);
unset($variable2);