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<?php class GrandPa { protected $elements = array( 'a' => 1, 'b' => 2, ); public function mergeElements($childElements = null) { // 用反射实现 $elements = $this->elements; $class = new ReflectionClass($this); while($class = $class->getParentClass()) { $properties = $class->getDefaultProperties(); if(isset($properties['elements'])) { $elements = array_merge($properties['elements'], $elements); } } return $elements; } } class Father extends GrandPa { protected $elements = array( 'c' => 3, ); } class Me extends Father{ protected $elements = array( 'd' => 4, ); } $stime=microtime(true); for ($i=1;$i<=100000;$i++){ $me = new Me(); $me->mergeElements(); } $etime=microtime(true); echo $etime-$stime;