From professional translators, enterprises, web pages and freely available translation repositories.
$a = 3; $a += 5; // sets $a to 8, as if we had said: $a = $a + 5; $b = "hello "; $b .= "there!"; // sets $b to "hello there!", just like $b = $b. "there!";
the value of an assignment expression is the value assigned.
