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    ▪有关php类的private属性继承问题详解      介绍：如果父类有私有的属性。那么父类的方法只为父类的私有属性服务。 以下这个例子在子类中重新定义了一个属性$sal，系统却返回了父类的属性。   代码如下: <? class employee{ privat.........

    ▪php实现百度网盘图片直链的代码分享      百度网盘外链不能在网页里直接使用图片，做了一个小功能，准备放在博客里分享图片。 文件名：bdp.php   代码如下: <?php require_once('snoopy.class.php'); //http://www.abc.com/bdp.php?shareid=29160&u.........

    ▪有关php类中private访问控制的疑问      在php手册中遇到一个没想明白的问题，记录在此，方便需要的朋友。   代码如下: <?php class Bar { public function test() { $this->testPrivate(); $this->testPublic(); } public function testPublic() { echo ".........

代码如下:

<?
class employee{
private $sal=3000;
//protected $sal=3000;
public function getSal(){
return $this->sal;
}
}
class Manager extends employee {
protected $sal=5000;

public function getParentSal(){
//这里返回的是父类的private属性.
return parent::getSal();
}
}
$manager = new Manager();
echo "PHP ".phpversion()."<br>";
echo $manager->getSal();
echo "<br>";
echo "parent's \$sal ".$manager->getParentSal();
?>

代码如下:

<?
class employee{
//private $sal=3000;
protected $sal=3000;
public function getSal(){
return $this->sal;
}
}

class Manager extends employee {
protected $sal=5000;

public function getParentSal(){
//这里返回的是父类的private属性.
return parent::getSal();
}
}
$manager = new Manager();
echo "PHP ".phpversion()."<br>";
echo $manager->getSal();
echo "<br>";
echo "parent's \$sal ".$manager->getParentSal();
?>

代码如下:

<?
class employee{
private $sal=3000;
public function getSal(){
return $this->sal;
}
}

class Manager extends employee {
private $sal=5000;
//重写过的方法
public function getSal(){
return $this->sal;
}
public function getParentSal(){
//这里返回的是父类的private属性.
return parent::getSal();
}
}
$manager = new Manager();
echo "PHP ".phpversion()."<br>";
echo $manager->getSal();
echo "<br>";
echo "parent's \$sal ".$manager->getParentSal();
?>

代码如下:

<?
class employee{
private $sal=3000;
public function getSal(){
return $this->sal;
}
}
class Manager extends employee {
protected $sal=5000;
public function getParentSal(){
return $this->sal;
}
}
$manager = new Manager();
echo "PHP ".phpversion()."<br>";
echo $manager->getSal();
?>

代码如下:

<?
class employee{
protected $sal=3000;
public function getSal(){
return $this->sal;
}
}
class Manager extends employee {
protected $sal=5000;
public function getParentSal(){
return $this->sal;
}
}
$manager = new Manager();
echo "PHP ".phpversion()."<br>";
echo $manager->getSal();
?>

代码如下:

<?php
require_once('snoopy.class.php');
//http://www.abc.com/bdp.php?shareid=29160&uk=2855065916
$url = 'http://pan.baidu.com/share/link?shareid=' . $_GET['shareid'] . '&uk=' . $_GET['uk'];
$snoopy = new Snoopy();
$snoopy -> read_timeout = 0;
$snoopy -> fetch($url);
$n = $snoopy -> results;
$regex = '/(_.src="/blog_article/)(. )(";)/';
$match = '';
preg_match($regex, $n, $match);

if(preg_match('/.gif/', $match[2])){
header("Content-type: image/gif");
imagegif(imagecreatefromgif($match[2]));
}elseif(preg_match('/.jpg/', $match[2])){
header("Content-type: image/jpeg");
imagejpeg(imagecreatefromjpeg($match[2]));
}elseif(preg_match('/.png/', $match[2])){
header("Content-type: image/png");
imagepng(imagecreatefrompng($match[2]));
}elseif(preg_match('/.wbmp/', $match[2])){
header("Content-type: image/vnd.wap.wbmp");
imagewbmp(imagecreatefromwbmp($match[2]));
}else{}
?>

代码如下:

<?php
class Bar
{
public function test() {
$this->testPrivate();
$this->testPublic();
}
public function testPublic() {
echo "Bar::testPublic\n";
}
private function testPrivate() {
echo "Bar::testPrivate\n";
}
}
class Foo extends Bar
{
public function testPublic() {
echo "Foo::testPublic\n";
}
private function testPrivate() {
echo "Foo::testPrivate\n";
}
}
$myFoo = new foo();
$myFoo->test(); // Bar::testPrivate
// Foo::testPublic