php class
源代码很长,抽象下,大概流程是这样的。{
$instest = new test();
$insobject = new object();
$instest->test();
}
class test{
function test(){
$insobject->hello();
}
}
class object{
function hello(){
echo "hello";
}
}
这样就会出现 如题的错误:Fatal error: Call to a member function hello() on a non-object in /home/latelx64/workspace/zhebo/init.php on line 158
难道是在实例里不能调用其他实例的public函数么?
如果不能的话应该如何以类似的方式解决呢???
本人新学PHP,希望各位高手给予指导!!!
回复讨论(解决方案)
如果你非要这样做的话,那么函数就需要传参,传一个对象进来。
{$instest = new test();$insobject = new object();$instest->test($insobject);}class test{function test($insobject){$insobject->hello();}}class object{function hello(){echo "hello";}}
一般从设计的角度来说,采用继承的方式,会更好。
可以用继承举个例子么,非常感谢
源代码很长,抽象下,大概流程是这样的。
{
$instest = new test();
$insobject = new object();
$instest->test();
}
class test{
function test(){
$insobject->hello();
}
}
class object{
function hello(){
echo "hello";
}
}
这样就会出现 如题的错误:Fatal error: Call to a member function hello() on a non-object in /home/latelx64/workspace/zhebo/init.php on line 158
难道是在实例里不能调用其他实例的public函数么?
如果不能的话应该如何以类似的方式解决呢???
本人新学PHP,希望各位高手给予指导!!!
用继承的话,使用父类申明的实例里面的数据,又不会存在于使用子类申明的实例。
这与面向对象无关!
只是个变量作用域的问题!
class test{
function test(){
$insobject->hello();
}
}
中 $insobject 是局部变量,并且也没有赋值。
当然也就没有 hello 方法了
要在每个函数里申明 全局变量么?
这与面向对象无关!
只是个变量作用域的问题!
class test{
function test(){
$insobject->hello();
}
}
中 $insobject 是局部变量,并且也没有赋值。
当然也就没有 hello 方法了
class test{
function test(){
global $insobject;
$insobject->hello();
}
}
这样每个函数里 都要申明不是很复杂么!!没有什么委婉一点的么
这与面向对象无关!
只是个变量作用域的问题!
class test{
function test(){
$insobject->hello();
}
}
中 $insobject 是局部变量,并且也没有赋值。
当然也就没有 hello 方法了
$_ENV['?量名']
?玩意可以超全局使用,?似的?有:
$_GLOBALS['?量名'];$_GET['?量名'];$_POST['?量名'];$_REQUEST['?量名']等
如果你非要这样做的话,那么函数就需要传参,传一个对象进来。
{$instest = new test();$insobject = new object();$instest->test($insobject);}class test{function test($insobject){$insobject->hello();}}class object{function hello(){echo "hello";}}
一般从设计的角度来说,采用继承的方式,会更好。
用你这方法不行。Warning: Missing argument 1 for test::test(), called in C:\wamp\www\zhebo\index.php on line 24 and defined in C:\wamp\www\zhebo\x\init.php on line 170
class test{ function test(){ object::hello(); }}class object{ Public static function hello(){ echo "hello"; }}

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PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

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