<?php
class Father
{
public function getNewFather()
{
return new self();
}
public function getNewCaller()
{
return new static();
}
}
class Sun1 extends Father
{
}
class Sun2 extends Father
{
}
$sun1 = new Sun1();
$sun2 = new Sun2();
print get_class($sun1->getNewCaller()) . PHP_EOL;
print get_class($sun1->getNewFather()) . PHP_EOL;
print get_class($sun2->getNewCaller()) . PHP_EOL;
print get_class($sun2->getNewFather()) . PHP_EOL;
运行结果
D:\App\php-7.2.18\php.exe F:\www\php-project\php-inner\test.php
Sun1
Father
Sun2
Father
Process finished with exit code 0
结论：
1.new self() 无论何时都能获得自己
2.new static() 被谁调用获得谁
