This is a standard block.
| Valid: code sample A has more lines than B. | Invalid: shorter. | 
| // This code sample has more lines// than the "invalid" one.$one = 10; | $a = 10; | 
| Valid: shorter. | Invalid: code sample B has more lines than A. | 
| echo $foo; | // This code sample has more lines// than the "valid" one.print $foo; |