PHP data type conversion (character to number, numeric to character)

This article mainly introduces PHP data type conversion (character to number, number to character), has a certain reference value, now share to everyone, the need for friends can refer to

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 () "Memory: Purpose type to convert +val ()"

• Use the common type conversion function Settype (mixed var,string type)

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

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

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

1. <?php   $str = "123.9ABC";   $int =intval ($STR);     Converted value: 123   $float =floatval ($STR);//Converted value: 123.9   $str =strval ($float);   Converted string: "123.9"    ?>

The third mode of conversion: Settype ();

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