What is the common issue related to the "Allowed memory size exhausted" error in PHP?

The common issue related to the "Allowed memory size exhausted" error in PHP is when the script consumes more memory than the limit set in the php.ini file. This can happen when processing large amounts of data or running complex operations. To solve this issue, you can increase the memory limit in the php.ini file or adjust it programmatically within your PHP script using the `ini_set()` function.

// Increase memory limit programmatically
ini_set('memory_limit', '256M');