PHP reads external variable $GLOBALS-PHP Tutorial-php.cn

PHP reads external variable $GLOBALS

不言

Release： 2023-03-25 16:32:01

Original

1871 people have browsed it

This article mainly introduces about PHP reading external variables $GLOBALS, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

Reading external variables $GLOBALS

$one = 1;function demo(){
    $two = 2;    // 如果直接 $one 会在代码中报错
    // 读取自定义函数demo外部的变量one - $GLOBALS[&#39;one&#39;]
    $result = $two + $GLOBALS[&#39;one&#39;];    
    return $result;
}echo demo(); // 3

Copy after login

Create an external variable

function demo2(){
    // 创建一个外部变量
    $GLOBALS[&#39;aaa&#39;] = &#39;aaaaaaaa&#39;;    
    echo &#39;demo2&#39; . &#39;<br/>&#39;;
}// 这样用会报错, 需要先调用demo2函数才行
//echo $aaa;demo2();
 // demo2echo $aaa . &#39;<br/>&#39;; 
 // aaaaaaaa

Copy after login

Call multiple external variables

$one = 1;$two = 2;$five = 5;function demo(){
    // 调用多个外部变量
    global $one, $two, $five;    
    return $one + $two + $five;
}echo demo() . &#39;<br/>&#39;; // 8

Copy after login

Related recommendations:

Php reads data Basic operations

php method of reading the contents of BT seed files

The above is the detailed content of PHP reads external variable $GLOBALS. For more information, please follow other related articles on the PHP Chinese website!