Monitoring PHP can help identify performance issues and ensure that your PHP applications are running smoothly. There are several ways to monitor PHP on a UNIX platform, including using built-in functions, monitoring tools, and logging. Built-in functions: PHP provides several functions that can be used to monitor the performance of your code, such as memory_get_usage() and microtime(). These functions can be used to measure the amount of memory used by a script, execution time, and other perfor...