I have a problem with static keyword due to inheritance in PHP 5.3.
abstract class Object
{
protected static $_classDataSource = null;
public static function getDataSource()
{
return static::$_classDataSource;
}
public static function setDataSource( $dataSourc开发者_JAVA技巧e)
{
static::$_classDataSource = $dataSource;
}
}
class Film extends Object
{
}
class Actor extends Object
{
}
Film::setDataSource('FFF');
Actor::setDataSource('aaa');
echo Film::getDataSource();
echo Actor::getDataSource();
Result is: aaaaaa Expected result: FFFaaa
What should I do to make it as expected?
You need to redeclare the static variables in the child classes or break the reference set manually. See this answer.
I know it's not technically answering your exact question, but I have to ask: Why? If you need configuration (such as setting a data source), in most cases it's better to use instances...
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