What are common reasons for the error "Maximum execution time of 30 seconds exceeded" in PHP applications?

The error "Maximum execution time of 30 seconds exceeded" occurs when a PHP script takes longer than the defined maximum execution time to complete. This can happen due to inefficient code, large data processing, or infinite loops. To solve this issue, you can increase the maximum execution time in your PHP configuration settings or optimize your code to reduce processing time.

// Increase maximum execution time to 60 seconds
ini_set('max_execution_time', 60);