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<?php class Test extends \ArrayObject { public $defaults = array( 'k3' => 'v3', ); public function __construct() { parent::__construct( array( 'k1' => 'v1', 'k2' => 'v2', 'k3' => null, ) ); } public function offsetGet( $index ) { if ( isset( $this[$index] ) ) { return parent::offsetGet( $index ); } elseif ( isset( $this->defaults[ $index ] ) ) { return $this->defaults[ $index ]; } else { return null; } } } $o = new Test(); var_dump( isset( $o['k1'] ) ); var_dump( isset( $o['k3'] ) );
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Test::offsetGet($index) should either be compatible with ArrayObject::offsetGet(mixed $key): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/fnKPG on line 19 bool(true) bool(false)

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