PHP Data type conversions

Transferred from: http://www.tianzhigang.com/article.asp?id=280

PHP's data type conversions are cast, and the PHP data types that are allowed to be converted are:

• (int), (integer): Convert to Reshape
• (float), (double), (real): Convert to floating-point type
• (string): converted to a string
• (bool), (Boolean): Converted to Boolean type
• (array): Convert an array
• (object): Convert to Object

There are three ways to convert PHP data types:

• Precede the variable you want to convert with a target type enclosed in parentheses
• Use 3 specific types of conversion functions, intval (), Floatval (), Strval ()
• Use the common type conversion function Settype (mixed var,string type)

First conversion Mode: (int) (bool) (float) (string) (array) (object)

1. <?php
2. $num 1=3.14;
3. $num 2= (int)$num 1;
4. Var_dump ($num 1); //Output float (3.14)
5. Var_dump ($num 2); //output int (3)
6. ?>

Second mode of conversion: Intval () floatval () Strval ()

1. <?php
2. $str ="123.9ABC";
3. $int =intval ($str); //Converted value: 123
4. $float =floatval ($str); //Converted value: 123.9
5. $str =strval ($float); //converted string: "123.9"
6. ?>

The third mode of conversion: Settype ();

1. <?php
2. $num 4=12.8;
3. $FLG =settype ($num 4,"int");
4. Var_dump ($FLG); //output bool (true)
5. Var_dump ($num 4); //output int (.)
6. ?>

PHP Data type conversions