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<?php function tap($value, $callback) { $callback($value); return $value; } class Test { public $val = 0; public function increment($val) { $this->val += $val; } } $a = new Test(); var_dump( tap($a, function($value) { return $value->increment(5);}) );
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
object(Test)#1 (1) { ["val"]=> int(5) }

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