先看代码:class test(){
public $mPageNo = 1;
public $mPageSize = 20;
private $mPageOffset = 0;
}
请教,如何实现当给$mPageNo或者$mPageSize赋值的时候,就能自动给$mPageOffset赋值为($mPageNo-1)*$mPageSize ?
phpclass
public $mPageNo = 1;
public $mPageSize = 20;
private $mPageOffset = 0;
}
请教,如何实现当给$mPageNo或者$mPageSize赋值的时候,就能自动给$mPageOffset赋值为($mPageNo-1)*$mPageSize ?
phpclass
你不妨直接写个方法 setPageOffest($pageno=1, $pagesize=20)
private $mPage_size = 40; //每页条数
private $mPageOffset = 0; function __set($property, $value) {
if ($property=='mPage_no' || $property=='mPage_Size') {
$this->mPageOffset = (($this->mPage_no)-1) * ($this->mPage_size);
//print_r($this->mPageOffset);
}
}
function __get($property) {
return $this->$property;
}
}$t = new test();
$t->page_no = 2;
print_r($t->mPageOffset);
这样得到的却是0!!何解呢?
private $mPage_no = 1; //页码
private $mPage_size = 40; //每页条数
private $mPageOffset = 0;
function __set($property, $value) {
$this->{$property} = $value; // __set 并不会自动赋值
if ($property=='mPage_no' || $property=='mPage_Size') {
$this->mPageOffset = (($this->mPage_no)-1) * ($this->mPage_size); }
}
function __get($property) {
return $this->$property;
}
}$t = new test();
// $t->page_no = 2; 变量名错误,且需要注意区分大小写
$t->mPage_no = 2;
print_r($t->mPageOffset);