Bitshift And Concat Precedence¶

<< and >> and . (dot) operators used to have the same priority. Thus, they used to be processed one after the other, from left to right.

In PHP 8.0, the bitshift has now the highest precedence, and will happen before the concatenation.

PHP code¶

<?php

echo 35 << 1 . '.' . 0 + 5;

?>

Before¶

70.5

After¶

PHP version change¶

This behavior was deprecated in 7.4

This behavior changed in 8.0