Php Data type conversion

This article mainly shares the knowledge of PHP Data type conversion. PHP Data type conversion is forced conversion. The PHP Data types that can be converted include: (int), (integer): converted to integer & nbsp; (float), and (double), (real): convert to float type & nbsp; (string): convert to string & nbsp; (bool), (boolean): convert to boolean type & nbsp; (array ): convert to array & nbsp; (object): This article describes how to convert PHP Data types.

PHP Data type conversion is a forced conversion. The PHP Data types that can be converted include:

(Int), (integer): convert to integer

(Float), (double), (real): convert to floating point type
(String): convert to a string
(Bool), (boolean): convert to boolean type
(Array): convert to an array

(Object): convert to object

There are three conversion methods for PHP Data types:

(1) add brackets before the variable to be converted.

Target type, for example: (int) (bool) (float) (string) (array) (object)

The following is an example:

  $ Num1 = 3.14;
$ Num2 = (int) $ num1; // forcibly converted to int type
Var_dump ($ num1); // output float (3.14)
Var_dump ($ num2); // output int (3)

(2) use three types of conversion functions: intval (), floatval (), and strval (). The example is as follows:

  $ Str = "123.9abc ";
$ Int = intval ($ str); // converted value: 123
$ Float = floatval ($ str); // converted value: 123.9
$ Str = strval ($ float); // converted string: "123.9"

(3) use the common type conversion function settype (mixed var, string type). The example is as follows:

  $ Num4 = 12.8;
$ Flg = settype ($ num4, "int ");
Var_dump ($ flg); // output bool (true)
Var_dump ($ num4); // output int (12)