Self Executing functions in PHP5.3?
13,793
Function Call Chaining, e.g. foo()()
is in discussion for PHP5.4. Until then, use call_user_func
:
$a = call_user_func(function(){
$hidden = 'a';
return function($new) use (&$hidden){
$hidden = $new;
return $hidden;
};
});
$a('foo');
var_dump($a);
gives:
object(Closure)#2 (2) {
["static"]=>
array(1) {
["hidden"]=>
string(3) "foo"
}
["parameter"]=>
array(1) {
["$new"]=>
string(10) "<required>"
}
}
As of PHP7, you can immediately execute anonymous functions like this:
(function() { echo 123; })(); // will print 123
Author by
AriehGlazer
Updated on June 15, 2022Comments
-
AriehGlazer almost 2 years
I was trying to borrow some programing paradigms from JS to PHP (just for fun). Is there a way of doing:
$a = (function(){ return 'a'; })();
I was thinking that with the combination of
use
this can be a nice way to hide variables JS style$a = (function(){ $hidden = 'a'; return function($new) use (&$hidden){ $hidden = $new; return $hidden; }; })();
right now I need to do:
$temp = function(){....}; $a = $temp();
It seems pointless...
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M H almost 8 yearsWould you possibly be able to update this? Would be appreciated.
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M H almost 8 yearsTerrific, I have no doubt this will be a value to the community and future googlers.
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Josef Engelfrost over 5 yearsFYI, function call chaining (which allows
(function () {...})();
) does not work in PHP 5.6.