reference: http://docs.php.net/manual/en/language.oop5.late-static-bindings.php
Note:
In non-static contexts, the called class will be the class of the object instance. Since $this-> will try to call private methods from the same scope, using static:: may give different results. Another difference is that static:: can only refer to static properties.
class Father{ public function __construct() { $this->init(); } private function init() { echo 'father' . PHP_EOL; }}class Son extends Father{ public function __construct() { parent::__construct(); $this->init(); } private function init() { echo 'son' . PHP_EOL; }}new Son();输出
fatherson
class Father{ public function __construct() { $this->init(); } private function init() { echo 'father' . PHP_EOL; }}class Son extends Father{ private function init() { echo 'son' . PHP_EOL; }}new Son();输出
father
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