Why 0 || 1 returns true in php?

Question

In Javascript and Python, 0 || 1 returns 1.

But in PHP, 0 || 1 returns true.

How to do if I want 0 || 1 return 1 in PHP?

another example,

$a is array(array('test'))

I want $a['test'] || $a[0] || array() return array('test'), How to do?

Answer 1

The other answers appear to only care about converting boolean to an integer. I think you really want for the second value to be the result if the first is falsy (0, false, etc.)?

For the other languages' behaviour, the closest we have in PHP is the short-hand "ternary" operator: 0?:1.

That could be used in your script like: $result = get_something() ?: 'a default';

See the ternary operator documentation for details.

Answer 2

Because 0 || 1 is a boolean expression, it assumes you want a boolean result.

You can cast it to an int:

echo (int)(0 || 1);