Altering the elements of a collection in a foreach loop

Can I do the following in PHP?

foreach ($c开发者_JAVA百科ollection as &$element)
    $element = ...

Almost - you should remove the %. Here's an example, which worked locally with PHP 5.3.4 :

$foo = array("1" => "First", "2" => "Second");

foreach($foo as $key => & $element) {
    $element = $element . " With More Text Attached!\n";
}

print_r($foo);

results in

Array ( 
   [1] => First With More Text Attached! 
   [2] => Second With More Text Attached! 
)