Add attribute to an object in PHP

Question

How do you add an attribute to an Object in PHP?

Answer 1

this is a static class but, the same principle would go for an intantiated one as well. this lets you store and retrieve whatever you want from this class. and throws an error if you try to get something that is not set.

class Settings{
    protected static $_values = array();

public static function write( $varName, $val ){ 
    self::$_values[ $varName ] = $val; 
}
public static function read( $varName ){ 

    if( !isset( self::$_values[ $varName ] )){
        throw new Exception( $varName . ' does not exist in Settings' );
    }

    return self::$_values[ $varName ]; 
}
}