foreach循环如何工作php？

Question

for example:

$numbers = array(1, 2, 3, 4, 5);
 
foreach($numbers as $value)
{
    echo $value;
}

what does as do, I assume it's a keyword because it is highlighted as one in my text editor. I checked the keyword list at http://www.php.net/manual/en/reserved.keywords.php and the as keyword was present. It linked to the foreach construct page, and from what I could tell didn't describe what the as keyword did. Does this as keyword have other uses or is it just used in the foreach construct?

Answer 1

as is just part of the foreach syntax, it's used to specify the variables that are assigned during the iteration. I don't think it's used in any other context in PHP.