Does finally execute after return php?
finally executes every*† timeRegardless of errors, exceptions, or even Show *It will not run if the ExceptionOne common use I see is closing a database connection in a long running worker - you want this to happen every time (with or without an exception) so you don't end up with a dangling connection that blocks the database server from accepting new connections. Consider this pseudo-code:
Here we will always close the database connection. If it's a normal query, we close connection after success, and the script will continue to execute. If it's an erroneous query, then we still close after the exception has been thrown, and the uncaught exception will cause the script to halt. Here's
an example with
This will make it close the connection with or without an exception. ReturnOne of the more obscure behaviors is its ability to execute code after a return statement. Here you can set a variable after the function has returned:
but an assignment will be what's returned in try:
and returning in the finally overrides the return in the try:
note this behavior was different in php 5:
https://3v4l.org/biO4e Exceptional ReturnYou can kinda make it look like throwing 2 exceptions to bubble up at the same time:
https://3v4l.org/2AYmF But you can't really catch the "first" exception that I'm aware of to do anything fun at runtime:
https://3v4l.org/Jknpm * DieIf you
https://3v4l.org/pc9oc † Hardware FailureFinally, you should understand that the IntroductionThere is a peculiar behaviour of finally block when either try block or catch block (or both) contain a return statement. Normally return statement causes control of program go back to calling position. However, in case of a function with try /catch block with return, statements in finally block are executed first before returning. ExampleIn following example,div() function has a try - catch - finally construct. The try block without exception returns result of division. In case of exception, catch block returns error message. However, in either case statement in finally block is executed first. ExampleLive Demo getMessage(); } finally{ echo "This block is always executed\n"; } } $x=10; $y=0; echo div($x,$y); ?> OutputFollowing output is displayed This block is always executed Division by 0 Change value of $y to 5. Following output is displayed This block is always executed 2
Updated on 18-Sep-2020 08:47:10
Does finally execute after return?Yes, the finally block will be executed even after a return statement in a method. The finally block will always execute even an exception occurred or not in Java. If we call the System. exit() method explicitly in the finally block then only it will not be executed.
Does finally always execute?A finally block always executes, regardless of whether an exception is thrown.
Is finally executed before or after catch?When you are using try-catch-finally. If your code get any error then it goes to first catch and then finally. If your code does not threw any error then it will at last calls the finally and then further goes for execution.
Can we have return statement after finally block?Yes, we can write a return statement of the method in catch and finally block. There is a situation where a method will have a return type and we can return some value at any part of the method based on the conditions.
|