I have few questions about error_reporting(E_ALL);:
1-Where we must put this php function in a script,at the starting of codes?
2-If i check my page without this function and see that there is no error,does it need to add?
3-If the page which has this function has error,does it return the error in the same page?
4-If i have several script php in a page does it need that i put it for each script?