<?php

class A

{

public static function aa()

{

echo "这是A类aa的输出方法";

}

public static function bb()

{

static::aa();

}

}

class B extends A

{

public static function aa()

{

echo "这是B类aa的输出方法";

}

}

B::bb();

运行后出现Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM, expecting T_VARIABLE in F:\Appserv\www\php\1-3.php on line 13就是那个static::aa();

是因为php版本问题吗