I need to be able to allow in the constructor of a class to pass by reference OR by value.
class test{
public function __construct(&$value){
}
}
$reference = "I'll be passed by reference of course";
//Everything good
$test = new Test($reference);
//This of course WONT work
$test = new Test("This would be by value ... on a reference, not cool since I don't refere to any other variable");
Any thoughts? Thanks :)
分享 Perhaps because the string literal could be too big?
If you're doing this for the purpose of optimisation, then it's entirely unnecessary. The string will not be copied when you pass it into the function! Passing it by reference does not use less memory or is otherwise more efficient. PHP's handling of memory is beyond your control, and PHP is handling things for you and doesn't need such optimisations from your side. See copy-on-write and string interning, which is what PHP does behind the scenes.
PHP references are not C pointers! They're a higher level concept for the purpose of "output parameters", not for optimisations. Your API is obviously not designed to use references, so don't use them.
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