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PHP Casting
Sometimes you need to change a variable from one data type into another, and sometimes you want a variable to have a specific data type. This can be done with casting.

Change Data Type
Casting in PHP is done with these statements:

(string) - Converts to data type String
(int) - Converts to data type Integer
(float) - Converts to data type Float
(bool) - Converts to data type Boolean
(array) - Converts to data type Array
(object) - Converts to data type Object
(unset) - Converts to data type NULL
Cast to String
To cast to string, use the (string) statement:

ExampleGet your own PHP Server
$a = 5;       // Integer
$b = 5.34;    // Float
$c = "hello"; // String
$d = true;    // Boolean
$e = NULL;    // NULL

$a = (string) $a;
$b = (string) $b;
$c = (string) $c;
$d = (string) $d;
$e = (string) $e;

//To verify the type of any object in PHP, use the var_dump() function:
var_dump($a);
var_dump($b);
var_dump($c);
var_dump($d);
var_dump($e);