关于PHP和闭包[关闭]

• Are closures possible in PHP 5.3?
• I'm looking for a simple closure example, minimal code is appreciated.
• If closures are possible in PHP 5.3, does it behave similarly to Javascript's closures in terms of scoping?
• What are the difference between Javascript closures and PHP closures (if it exists)?

• Are closures possible in PHP 5.3?

Yes

• I'm looking for a simple closure example, minimal code is appreciated.

$text = "Hello World";
$closure = function () use ($text) { echo $text; }
$closure();

• If closures are possible in PHP 5.3, does it behave similarly to Javascript's closures in terms of scoping?
• What are the difference between Javascript closures and PHP closures (if it exists)?

Don't know. I never had a deeper look at JSs closures, but maybe you get an idea of whats PHPs closures are like after reading Wikipedia: Closure (Computer Science)