Using Exit inside IF:ENDIF control structure

Question

It's a fictitious example. And I want to understand "What really happens when using EXIT in this code":

function my_template_redirect() {
    $page = get_query_var('pagename'); //get some value
    if ( $page == 'products' ): //compare with something
        //show products
        EXIT;
    elseif ( $page == 'product' ): //compare "else"
        //show product
        EXIT;
    endif;
}
add_filter( 'template_redirect', 'my_template_redirect' );

Ok. Step by step execute (my own logical version)

|-code executing
|-filter callback my_template_redirect()
|-if start (or else)
   |-exit
   |-start execute new template

What happen after EXIT call? Control structure IF:ENDIF automatically closes? Or still opened in new code? Is this bad way to organize code?

Thanks in advance!

PS I'm using WP example for better understanding my bad English :)

exit terminates the script. Nothing can happen "after" calling exit because the script is dead. e.g. RTFM: php.net/exit — Marc B
– Marc B, Commented Nov 7, 2014 at 15:41
You'd probably be better off using return in these instances. — rnevius
– rnevius, Commented Nov 7, 2014 at 15:43

rnevius · Accepted Answer · 2014-11-07 15:42:11Z

1

If you read the PHP docs on exit(), you'll find that exit completely terminates the current script.

However:

Shutdown functions and object destructors will always be executed even if exit is called.

answered Nov 7, 2014 at 15:42

rnevius

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5 Comments

Za Noza Over a year ago

I know this. What about IF:ENDIF?

rnevius Over a year ago

As I mentioned, using exit in your example above, will completely terminate the script. It doesn't matter whether it's in if or endif. The function just stops running.

Za Noza Over a year ago

Still opened or will close? It possible leak memory?

rnevius Over a year ago

No, it's not still open. The script terminates. Terminates. At the end of any PHP process, the process ends just like any other program. Terminates. No memory is left over. Terminates. No memory leak. Terminates. ;-)

Za Noza Over a year ago

:) Thanks! +1! But I'm waiting one day (maybe anyone has another opinion). I like your answer :)

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