View difference between Paste ID: sPb0i8U6 and Gg573Hny

 <?php
 
 /**
  * @name Custom casting helper
  * @author [email protected]
  * @internal
  */
 interface Castable {
 	static function cast($var);
 }
 
 /**
  * @example hard casting (validation)
  */
 class ValidatedPositiveInteger implements Castable {
 	static function cast($var) {
 		if(!is_int($var)) {
 			throw new InvalidArgumentException('Value is not an integer');
 		}
 		if($var < 1) {
 			throw new InvalidArgumentException('Integer is not positive');
 		}
 		return $var;
 	}
 }
 
 /**
  * @example soft casting (sanitization)
  */
 class SanitizedPositiveInteger implements Castable {
 	static function cast($var) {
 		$var = (int)$var;
 		if($var < 1) $var = 1;
 		return $var;
 	}
 }
 
 // usage:
 
 $var = (ClassName)$var;
 
 function foo(ClassName $var) {}
 
 // in both cases will run under the hood:
 
 if($var instanceof Castable) $var = ClassName::cast($var);
 else { /*current behavior*/ }
 
 // usable cases:
 
 // 1. custom types with internal logic
 // 2. sanitization and validation of input
 // 3. casting from array to object (e.g. json, db row, etc.)
-// 4. casting from stdClass to object
+// 4. casting from stdClass to object
 // 5. custom type juggling
 // 6. custom context dependent serialization/unserialization