Example A-11. Migration from 2.0: concatenation for strings
In PHP 2.0 this would echo 11, in PHP 3.0 it would echo 2. Instead use:
$a = 1; $b = 1; echo $a + $b; |
This would echo 2 in both PHP 2.0 and 3.0.
$a = 1; $b = 1; echo $a.$b; |
This will echo 11 in PHP 3.0.