如何对待布尔值？

Question

I've received a boolean from a query, and I want to check if the boolean's value is greater than zero. Is it possible to modify the approach used when handling resources to check a boolean's value? (See; example of resource handling below:)

return (mysql_result($query, 0) == 1) ? true : false;

Any help appreciated. Thank you in advance.

Answer 1

Since PHP would interpret as a string, you can simply cast it as (bool)

return (bool)(mysql_result($query, 0));

Non-zero values will cast as TRUE. Note that you should only do this if the return values are 0 or 1. Negative values will cast as TRUE.

var_dump((bool)"1");
// bool(true)
var_dump((bool)"0");
// bool(false)
var_dump((bool)-2);
// bool(true)