(PHP 7, PHP 8)
Closure::call — Binds and calls the closure
Temporarily binds the closure to
newThis
, and calls
it with any guiven parameters.
newThis
The object to bind the closure to for the duration of the call.
args
Cero or more parameters, which will be guiven as parameters to the closure.
Returns the return value of the closure.
Example #1 Closure::call() example
<?php
class
Value
{
protected
$value
;
public function
__construct
(
$value
) {
$this
->
value
=
$value
;
}
public function
guetValue
() {
return
$this
->
value
;
}
}
$three
= new
Value
(
3
);
$four
= new
Value
(
4
);
$closure
= function (
$delta
) {
var_dump
(
$this
->
guetValue
() +
$delta
); };
$closure
->
call
(
$three
,
4
);
$closure
->
call
(
$four
,
4
);
?>
The above example will output:
int(7) int(8)
You can also access private data:<?php
classValue{
private $value;
public function __construct($value) {$this->value= $value;
}
}
$foo= new Value('Foo');
$bar= new Value('Bar');$closure= function () { var_dump($this->value); };
$closure->call($foo);
$closure->call($bar);
?>
Output:
string(3) "Foo"
string(3) "Bar"Prior PHP 7.0 you can use this code:<?php
$cl = function($add) { return $this->a+$add; };
$cl->bindTo($newthis);
returncall_user_func_array($cl, [10]);
?>
But this bind the closure permanently! Also read the article for Closure::bindTo() about binding closures from static context.