How can I jump out of the if statement block?

Question

I have a code like this:

if (true) {
    echo 'one ';
    /* I need to jump out of this block */
    echo 'two ';
}
echo 'three ';

And here is expected result:

one three

How can I do that?

You may find the following questions elsewhere on Stack Overflow helpful: 1) http://stackoverflow.com/questions/4545769/php-exit-from-if-block; 2) http://stackoverflow.com/questions/7468836/any-way-to-break-if-statement-in-php — Mike Zavarello, Jun 26 '16 at 01:45
I cannot think of a single use case. Have you a useful example? I'm just curious. — AbcAeffchen, Jun 26 '16 at 02:10

user31415 · Accepted Answer · 2016-06-26T01:53:23.230

3

do {
  if (true) {
    echo 'one ';
    break;
    echo 'two ';
  }
} while(0);
echo 'three ';

Just use the break function. One can prevent deep nesting full of if-else statements in many cases by breaking

edited Jun 26 '16 at 01:53

answered Jun 26 '16 at 01:50

user31415

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`break` doesn't work inside an `if` block. – Sunny Patel Jun 26 '16 at 01:50
@SunnyPatel fixed it – user31415 Jun 26 '16 at 01:53
1

Haha, that is one way of doing it. But then again why have all that when `echo 'two';` will never get called? That's some overhead to manage! :P – Sunny Patel Jun 26 '16 at 01:55
1

@SunnyPatel - I would assume that in practice that the break is conditional. I imagine that once you have enough "breakout" conditions that it's easier than deep nesting ifs. – Mr. Llama Jun 26 '16 at 02:08
A former mainframe programmer's delight. – Vrac Jun 26 '16 at 02:14
The echos are purely for demonstration, and are placeholders. Of course someone wouldn't actually use this if they only had the two echo statements. But they wouldn't – user31415 Jun 26 '16 at 03:00

score 1 · Answer 2 · answered Jun 26 '16 at 01:48

1

You could just have another if statement. You can only escape out of for, while, and do-while loops using the break statement.

if (true) {
    echo 'one ';
    if (false) {
        echo 'two ';
    }
}
echo 'three ';

goto statements in general are just bad practice.

answered Jun 26 '16 at 01:48

Sunny Patel

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Who said that the author would use goto statements? – user31415 Jun 26 '16 at 05:19

score 0 · Answer 3 · answered Jun 26 '16 at 01:43

0

You can't break out of an if block. There has to be a reason why you'd want to break out there otherwise you'd just remove echo two and be done with it. That being the case, just enclose the rest of the code in another condition so that it only executes when you want it to.

answered Jun 26 '16 at 01:43

But those new buttons though..

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What about `goto` operator ? – stack Jun 26 '16 at 01:45
1

@stack I believe you just answered your own question. – Ian Jun 26 '16 at 01:47
1

yes that's an option, but my point is that you'd always be doing that based on some sort of condition so either way you'll need another if statement once the condition is resolved. – But those new buttons though.. Jun 26 '16 at 01:48

How can I jump out of the if statement block?

3 Answers3