PHP分在类方法中使用全局变量[关闭]

Question

i am trying to make $var1 to work on many different method

var1 is outcome of extract() from an array that contains url parts

exp:

$url = 'localhost/site/className/edit/254/...';

$arr[var1] = 'edit';

$arr[var2] = '254';

$var1 = 'something';

class myClass{
    function doSomething(){
        echo $var1;
    }
}

$obj = new myClass();
$obj->doSomething();

output:

Notice: Undefined variable: var1 in....

is there any way to fix it??

Answer 1

2 ways to fix it:

First, the best - passing variables as function arguments:

$var1 = 'something';

class myClass{
    function doSomething($var){
        echo $var;
    }
}

$obj = new myClass(); //You could also pass it to constructor
$obj->doSomething($var1);

Second, working, but is considered to be a bad practice:

$var1 = 'something';

class myClass{
    function doSomething(){
        global $var1 ;
        echo $var1;
    }
}

$obj = new myClass();
$obj->doSomething();