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<?php class A { protected $i = 1; public function __toString() { $this->i++; return (string) $this->i; } } $a = new A; $b = [100, $a]; var_dump( $a, array_intersect($b, $b), $a );
Output for git.master, git.master_jit, rfc.property-hooks
object(A)#1 (1) { ["i":protected]=> int(6) } array(1) { [0]=> int(100) } object(A)#1 (1) { ["i":protected]=> int(6) }

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