Prior PHP 7.0 you can use this code:
<?php
$cl = function($add) { return $this->a + $add; };
$cl->bindTo($newthis);
return call_user_func_array($cl, [10]);
?>
But this bind the closure permanently! Also read the article for Closure::bindTo() about binding closures from static context.
Closure::call
(PHP 7, PHP 8)
Closure::call — Binds and calls the closure
Description
Temporarily binds the closure to newThis, and calls
it with any given parameters.
Parameters
-
newThis -
The object to bind the closure to for the duration of the call.
-
args -
Zero or more parameters, which will be given as parameters to the closure.
Return Values
Returns the return value of the closure.
Examples
Example #1 Closure::call() example
<?php
class Value {
protected $value;
public function __construct($value) {
$this->value = $value;
}
public function getValue() {
return $this->value;
}
}
$three = new Value(3);
$four = new Value(4);
$closure = function ($delta) { var_dump($this->getValue() + $delta); };
$closure->call($three, 4);
$closure->call($four, 4);
?>The above example will output:
int(7) int(8)
add a note
User Contributed Notes 2 notes
sergey dot nevmerzhitsky at gmail dot com ¶
8 years ago
php-net at gander dot pl ¶
3 years ago
You can also access private data:
<?php
class Value {
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"
