PHP check existance of negative index not working?

Question

I have some code that runs fine until it hits this:

if(array_key_exists($snIdx, $fields));
    $surnameField = trim($fields[$snIdx]);

or other version I tried:

if(isset($fields[$snIdx));
    $surnameField = trim($fields[$snIdx]);

The $snIdx = -1. It gives me Undefined offset error at second line ($surname = trim...). I think I don't need to paste rest of code as the exception says there is sth wrong with those functions. My PHP version is 5.4.16.

No I don't. That's why the exception is thrown. But that's why there is a condition. — Joe, Apr 04 '14 at 11:21
Your condition does nothing, since you have `;` at the end of it. — dkasipovic, Apr 04 '14 at 11:23
Thanks for pointing it out. I guess I have to go outside for a while to reset my brain. — Joe, Apr 04 '14 at 11:26

score 2 · Answer 1 · answered Apr 04 '14 at 11:21

2

Remove the semicolon from the end of the if line. Otherwise it's equivalent to:

if( something) {
    // no-op
}
$surnameField = trim($fields[$snIdx]); // undefined offset error.

answered Apr 04 '14 at 11:21

Niet the Dark Absol

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Ahah:D +1 Shame on me. – Joe Apr 04 '14 at 11:25
1

I am ashamed that it took me four whole minutes to answer this question :p – Niet the Dark Absol Apr 04 '14 at 11:27

PHP check existance of negative index not working?

1 Answers1