Is it possible to control the use of RAM in a program?

In PHP, memory usage management is possible but limited. Main methods:

• Using the function ini_set('memory_limit', '128M') to set the memory limit that the script can use.
• Manually freeing memory, for example, using unset() to delete variables that are no longer needed.
• Optimizing code to reduce memory consumption (e.g., avoiding storing large arrays in memory).

Example of setting the memory limit:

ini_set('memory_limit', '256M');

Full control over memory, as in languages with manual memory management (C/C++), is not available in PHP, as memory is managed by the garbage collector and the interpreter.