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$that = $this;
$closure = function (...) use ($that) { ... };
Found on: http://css.dzone.com/polls/what-new-feature-php-54
Could someone please explain what it does? Preferably with an example.
that is a way to have access to the methods of a class from a anonymous function defined in it. but since the title is “php 5.4 closures” you don’t need to do that any more, this is one of the updates made in 5.4, you can use $this (without passing it to another variable like $that). you can see here http://php.net/ChangeLog-5.php that one of the changes is “Added closure $this support back”