如何回显功能以外的东西？

Question

在下面的代码中，我想在public function之外echo​​。

Public function lol(){ 
$green ="green"; 
} 

例如，我想在以下代码中回显$green。

public function green(){ 
echo"this is $green"; 
} 

Answer 1

你作为一个参数传递$green和回声函数的返回值：

function green($green) { 
    return "This is ". $green; 
} 

echo green('green'); //Results in: This is green 
echo green('yellow'); //Results in: This is yellow 

Answer 2

试试下面的代码：在构造函数中

function __construct() { 
     parent::__construct(); 
     $green ="green"; 
    } 

public function green(){ 
echo"this is $green"; 
} 

的$绿色变量。

Answer 3

$green; 

class s { 

    public function lol() { 
     $GLOBALS['green'] = "green"; 
    } 

} 

$instance = new s(); 
$instance->lol(); 
echo $green; 

Answer 4

使用global variables与$GLOBALS：

function lol(){ 
    $GLOBALS['green'] ="green"; 
} 
lol(); 
echo $green;