How php sets variable types

This article mainly explains "how to set variable types in php". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to set variable types in php.

In php, you can use the settype () function to set the variable type, syntax "settype ($var," data type ")"; data type values can be "boolean", "integer", "float", "string", "array", "object", "null".

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

In php, you can use the settype () function to set the variable type.

The settype () function sets the data type of the variable. (version requirements: PHP 4, PHP 5, PHP 7)

Syntax:

Settype ($var, $type) / / sets the variable var type to type type

The possible values of $type are:

"boolean" (or "bool", starting with PHP 4.2.0)

"integer" (or "int", starting with PHP 4.2.0)

"float" (available only after PHP 4.2.0, "double" used in older versions is now disabled)

"string"

"array"

"object"

"null" (since PHP 4.2.0)

Return value: TRUE is returned if the setting is successful, and FALSE is returned if it fails.

Example:

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