Other incompatibilities

Example D-11. Migration from 2.0: concatenation for strings

echo "1" + "1";

In PHP 2.0 this would echo 11, in PHP 3.0 it would echo 2. Instead use:
echo "1"."1";
$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.


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