exit();

zeberdeee

exit();

Not sure what this actually does, i use it at the end of a php script, because if someone clicks on a insert button in a form more than once, the program does not attempt to add twice.
If i leave it off the program will add the record twice, it is effective for that but are there any drawbacks??

Ps once the user has added a record the script should end anyway

zeb

As far as I know, exit() is simply a way to end the script and return a number or a string (it it is given one as an argument). It is identical to die().

I think it depends on how the rest of your script is written and where exit() is placed, but it is harmless and (in your case, it seems) neccessary if you want to keep the user from entering something twice. You could pass the string: 'Please don't click that button twice, you'll wear it out.' to the exit() function (it's actually not a function - it's a language construct) if you wanted to be more informative. (personally I think plain vanilla text warnings are ugly, but...)

zeberdeee

should the exit(); function be used to terminate all php scripts.
I think it ends the mysql permenent connection but that ends when the script is thrown to the browser anyway does it not.
Like that a new saying:
'thrown to the browser'

zeb

Originally posted by zeberdeee
should the exit(); function be used to terminate all php scripts.
I think it ends the mysql permenent connection but that ends when the script is thrown to the browser anyway does it not.

You don't need to terminate script with exit() (or anything for that matter). exit() can be used if your script reaches a certain point in the script (usually buried within if-then statements) and you don't want it to execute any more of the script. There are other (prettier) means of terminating a script with an appropriate message or feedback string fed to a page which uses HTML and Style-Sheets to format the message.

I'm pretty sure that PHP closes all connections with MySQL upon finishing a script.