if语句中的boolean

Question

If I want to execute code only if a variable is true, should I have:

if ($option) { /* code */ }

or

if ($option == TRUE) { /* code */ }

Doesn't the first one imply that also values like 1, 2, 3 etc. will execute the code.

Is the second one the better option?

Answer 1

I think what you are looking for is the === operator. The manual gives a decent description of the various comparison operators.

The === operator compares type as well as value.

You may also be interested in the PHP Caparison Tables. They will describe how the comparison operators work when comparing two different types.