after early return does next code execute - php

Question

I have php file where i use if statments and i call this file via ajax.. onSuccess it gives me result if file is upload successfully or error.
Code look like this:
if(empty($_FILES['file']['name'])){
return "no image was selected";
}
if($two_many_images){
return "Only x images are alowed to upload";
}
if($size>2014522){
return "Size error";
}
foreach($_FILES["file"]['tmp_name'] as $key=>$imgLocation){
uploadImage($_FILES["fileToUpload"]['tmp_name'][$key], $imgLocation);
}
Question : In first if statment condition is true, wil my second if statment execute ?

Answer 1

This can be easily demonstrated, for example you have a function:
funciton foo(){
echo "foo\n";
return;
echo 'bar';
}
if you call
foo();
It will print out
foo
But not bar. Once execution pointer hits the return it will return back to where foo() was called from. This can also be easily shown.
foo();
foo();
foo();
Prints
foo
foo
foo
UPDATE: based off your comments the correct way to do what you want is this
if(empty($_FILES['file']['name'])){
echo "no image was selected";
exit();
}
if($two_many_images){
echo "Only x images are alowed to upload";
exit();
}
if($size>2014522){
echo "Size error";
exit();
}
foreach($_FILES["file"]['tmp_name'] as $key=>$imgLocation){
uploadImage($_FILES["fileToUpload"]['tmp_name'][$key], $imgLocation);
}
I use exit() instead of return, because it's more readable and makes more sense, even though in your case return has the same effect. Exit will completely end execution for php, which is really what you want. You could also do something like
die( 'Message' );
Or
exit( 'Message' );
As well which will exit and output the message. They are all pretty much the same... I put echo first just because it always feels a bit dirty to me to put stuff in exit. Not sure why that is, maybe it I link it to unintended behavior because of seeing die() so much at the top of files not meant to be ran outside of framework. But I digress.
Just for the sake of completeness, based of your comments, if you call return from the global scope in PHP, it has no where to return to so execution just halts at that point. The reason it's better to use exit or die is that return has distinctly different behavior, which is to 'return' data from a function call. So it's more readable to use the method who's behavior best matches what you want. That being to end execution of the current script ( PHP instance ).

Answer 2

No, your second statement will not be executed. When the return is invoked, the rest of the code will not be executed. The PHP documentation says:
If called from the global scope, then execution of the current script file is ended.