How php converts numeric values to Boolean types

This article introduces the knowledge of "how php converts values to Boolean types". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Conversion: 1, the use of dual logical non-operators, syntax "!! need to convert the value"; 2, in front of the numerical variables to be converted with parentheses surrounded by the target type "(bool)" or "(boolean)", for example, "(bool) numerical"; 3, the use of boolval () function, syntax "boolval (numeric)".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php converts numeric values to Boolean types

1. Use the double logical non-operator "!"

Invert a Boolean value. For example:! true = false,! false = true,! 10 = false.

2. Add the target type "(bool)" or "(boolean)" enclosed in parentheses before converting the variable

(bool), (boolean): convert to Boolean type

3. Use the boolval () function

Boolval (): used to get the Boolean value of the variable