- <?php 
-   
- abstract class Foo { static $bar = 5; } 
- abstract class Bah { static $bar = 6; } 
-   
- function echoBar($classname) { 
-    echo $classname::$bar, PHP_EOL; 
- } 
-   
- echoBar('Foo'); 
- echoBar('Bah'); 
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