which way is correct way of checking not null variable

Question

Which is the more effective way of checking whether $value is not null

if ($value > 0 && $value !== 'null') { }

or

if (empty($value)) { }

For checking null you can use `is_null()` function of php – Saty Jul 01 '15 at 06:46 — Saty, Jul 01 '15 at 06:46
I'm pretty sure there is a duplicate of this somewhere.. – light Jul 01 '15 at 06:47 — light, Jul 01 '15 at 06:47

score 2 · Answer 1 · answered Jul 01 '15 at 06:52

PHP has an elegant is_null function to check if a variable is actually NULL.

if (is_null($value)) {
    // so something
}

empty, on the other hand, checks for empty strings (''), zeroes (as integers, floating points or even the string '0'), FALSE, empty arrays, uninitialized variables and NULLs.

score -1 · Answer 2 · answered Jul 01 '15 at 06:47

-1

if(!empty($value)){
 //do stuff
}else{
// do somthing else
}

answered Jul 01 '15 at 06:47

Tariq hussain

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Please consider adding at least some words explaining to the OP and to further readers of you answer why and how it does reply to the original question. – β.εηοιτ.βε Jul 01 '15 at 20:56

which way is correct way of checking not null variable

2 Answers2