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<?php class A { protected $i = 0; /*public function __toString() { $this->i++; return "$this->i"; }*/ } $a = new A; # echo $a; $b = [100, $a]; var_dump( array_intersect($b, $b) );
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Object of class A could not be converted to string in /in/fUn9t:18 Stack trace: #0 /in/fUn9t(18): array_intersect(Array, Array) #1 {main} thrown in /in/fUn9t on line 18
Process exited with code 255.

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