PHP Data type conversions

This article mainly shares the knowledge of PHP data type conversion.

PHP data type conversions are cast, and PHP data types that allow conversion are:

(int), (integer): Converting to plastic
(float), (double), (real): Converting to floating point type
(string): Converting to String
(bool), (Boolean): Convert to Boolean type
(array): Converting an array of
(object): Converting to Objects

There are three ways to convert PHP data types:

(1) Precede the variable to be converted with a target type enclosed in parentheses, for example:

(int)  (BOOL)  (float)  (string) (array) (object) The following example illustrates:

<?php
$num 1=3.14;
$num 2= (int) $num 1; Cast to int type
var_dump ($num 1);//output float (3.14)
Var_dump ($num 2);//output int (3)

(2) Use 3 specific types of conversion functions, intval (), Floatval (), Strval (), examples are as follows:

<?php
$str = "123.9ABC";
$int =intval ($STR); Value after conversion: 123
$float =floatval ($STR);//Convert value: 123.9
$str =strval ($float);//Convert after string: "123.9"

(3) Use the common type conversion function Settype (mixed var,string type), as follows:

<?php
$num 4=12.8;
$FLG =settype ($num 4, "int");
Var_dump ($FLG); output bool (TRUE)
Var_dump ($num 4);//output int (12)

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