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<?php class Foo { protected $titleInfo = []; public function bar() { $key = ''; if ( !isset( $this->titleInfo[$key] ) ) { $this->titleInfo[$key] = [ 42 ]; } var_dump( $this->titleInfo[$key] ); } } ( new Foo )->bar();
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> int(42) }

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