I have a Linux CentOS VPS and the garbage collector configuration is wrong. I need to fix it in an easy way since I have very little knowledge of it. I would like to know if there is a way to set all PHP settings to default. I use the Plesk control panel. There is in the panel the option of upgrading PHP to another version, for example from 5.3 to 5.6. I would like to know if using this option all values would return to the normal PHP standard, which is what I need. Thank you.