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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

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