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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 git.master_jit, git.master
object(Test)#1 (1) { ["val"]=> int(5) }

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