作业帮请友人帮忙讲解一下$GLOBALS的含义：function test() {$foo = "local variable";echo '$foo in global scope:' .$GLOBALS["foo"] ."\n";echo '$foo in current scope:' .$foo ."\n";}$foo = "Example content";test();上面输出$foo in global scope:Ex
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 14:46:35
请友人帮忙讲解一下$GLOBALS的含义：function test() {$foo = "local variable";echo '$foo in global scope:' .$GLOBALS["foo"] ."\n";echo '$foo in current scope:' .$foo ."\n";}$foo = "Example content";test();上面输出$foo in global scope:Ex
请友人帮忙讲解一下$GLOBALS的含义：
function test() {
$foo = "local variable";
echo '$foo in global scope:' .$GLOBALS["foo"] ."\n";
echo '$foo in current scope:' .$foo ."\n";
}
$foo = "Example content";
test();
上面输出
$foo in global scope:Example content
$foo in current scope:local variable
上面代码$GLOBALS["foo"]输出为啥是"Example content"而不是 "local variable"呀?
请友人帮忙讲解一下$GLOBALS的含义：function test() {$foo = "local variable";echo '$foo in global scope:' .$GLOBALS["foo"] ."\n";echo '$foo in current scope:' .$foo ."\n";}$foo = "Example content";test();上面输出$foo in global scope:Ex
$GLOBALS为全局变量,读取函数外的变量,函数外的变量名为$foo,所以要用$GLOBALS["foo"];
而函数内的普通变量直接用$foo就行