I just found this in some code and I can’t find anything on the web or php manual. Most likely since its an irregular character.
Here is one of the lines that uses it.
$showPlayer |= isset($params['node']) && $params['node'];
|= is to
+= is to
+; that is,
$a |= $b; is the same as
$a = $a | $b;. The
| operator is the bitwise OR operator.
Or-Equals. Similar to saying $var += 2, or $var = $var + 2. In this case, it’s
$showPlayer = $showPlayer | isset....