在用PHP编写类对象时,类中可不可以编写递归函数啊?
我写了一个,?php
class digui
{
function rev($str)
{
if(strlen($str)>0)
rev(substr($str,1));
echo substr($str,0,1);
return;
}
}
$d=new digui();
$d->rev('12345');
?>
编译的时候总出现函数求未定义,,,
为什么????????????????
我写了一个,?php
class digui
{
function rev($str)
{
if(strlen($str)>0)
rev(substr($str,1));
echo substr($str,0,1);
return;
}
}
$d=new digui();
$d->rev('12345');
?>
编译的时候总出现函数求未定义,,,
为什么????????????????
class digui
{
public function rev($str)
{
if(strlen($str)>0)
$this->rev(substr($str,1));
echo substr($str,0,1);
return;
}
} $d=new digui();
$d->rev('12345');
?>
class digui
{
public function rev($str)
{
if(strlen($str)>0)
//下面这两个都可以
//$this->rev(substr($str,1));
self::rev(substr($str,1));
echo substr($str,0,1);
return;
}
} $d=new digui();
$d->rev('12345');
?>
class digui
{
function rev($str)
{
if(strlen($str)>0)
$this->rev(substr($str,1));
echo substr($str,0,1);
return;
}
}
$d=new digui();
$d->rev('12345');
?>