使用get_defined_vars()获取当前范围内的所有变量

array get_defined_vars ( void )

function test() {
   $name = "Tom";
   $age = 25;
   $vars = get_defined_vars();
   echo "The variables in the current scope are:
";
   print_r($vars);
}

test();

The variables in the current scope are:
Array
(
    [name] => Tom
    [age] => 25
    [_GET] => Array
        (
        )

    [_POST] => Array
        (
        )

    [_COOKIE] => Array
        (
        )

    [_FILES] => Array
        (
        )

    [_SERVER] => Array
        (
            [HTTP_HOST] => localhost
            [HTTP_USER_AGENT] => Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0
            [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
            [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.5
            [HTTP_ACCEPT_ENCODING] => gzip, deflate
            [HTTP_CONNECTION] => keep-alive
            [HTTP_UPGRADE_INSECURE_REQUESTS] => 1
            [PATH] => C:Program Files (x86)Common FilesOracleJavajavapath;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShell1.0;C:WindowsSystem32OpenSSH;C:ProgramDataComposerSetupin;C:Program FilesGitcmd;C:Program Filesdotnet;C:Program FilesMicrosoft SQL ServerXToolsBinn;C:UsersmahmoodAppDataLocalProgramsPythonPython39Scripts;C:UsersmahmoodAppDataLocalProgramsPythonPython39;C:UsersmahmoodAppDataLocalMicrosoftWindowsApps;
            [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
            [TEMP] => C:UsersmahmoodAppDataLocalTemp
            [TMP] => C:UsersmahmoodAppDataLocalTemp
            [WINDIR] => C:Windows
            [USERPROFILE] => C:Usersmahmood
            [PSModulePath] => C:Program FilesWindowsPowerShellModules;C:Windowssystem32WindowsPowerShell1.0Modules
            [PUBLIC] => C:UsersPublic
            [SESSIONNAME] => Console
            [SystemDrive] => C:
            [SystemRoot] => C:Windows
            [ComSpec] => C:Windowssystem32cmd.exe
            [ProgramData] => C:ProgramData
            [ProgramFiles] => C:Program Files
            [ProgramFiles(x86)] => C:Program Files (x86)
            [ProgramW6432] => C:Program Files
            [OneDrive] => C:UsersmahmoodOneDrive
            [CommonProgramFiles] => C:Program FilesCommon Files
            [CommonProgramFiles(x86)] => C:Program Files (x86)Common Files
            [CommonProgramW6432] => C:Program FilesCommon Files
            [PROCESSOR_IDENTIFIER] => Intel64 Family 6 Model 140 Stepping 1, GenuineIntel
            [PROCESSOR_ARCHITECTURE] => AMD64
            [PROCESSOR_ARCHITEW6432] => AMD64
            [NUMBER_OF_PROCESSORS] => 8
            [OS] => Windows_NT
            [USERDOMAIN] => DESKTOP-890S6TR
            [USERNAME] => mahmood
            [USERDNSDOMAIN] => desktop-890s6tr.lan
            [ORIGINAL_PATH] => C:Program Files (x86)Common FilesOracleJavajavapath;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShell1.0;C:WindowsSystem32OpenSSH;C:ProgramDataComposerSetupin;C:Program FilesGitcmd;C:Program Filesdotnet;C:Program FilesMicrosoft SQL ServerXToolsBinn;C:UsersmahmoodAppDataLocalProgramsPythonPython39Scripts;C:UsersmahmoodAppDataLocalProgramsPythonPython39;C:UsersmahmoodAppDataLocalMicrosoftWindowsApps;
            [ORIGINAL_TEMP] => C:UsersmahmoodAppDataLocalTemp
            [ORIGINAL_TMP] => C:UsersmahmoodAppDataLocalTemp
            [ORIGINAL_PATHNAME] => C:Program Files (x86)Common FilesOracleJavajavapath;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShell1.0;C:WindowsSystem32OpenSSH;C:ProgramDataComposerSetupin;C:Program FilesGitcmd;C:Program Filesdotnet;C:Program FilesMicrosoft SQL ServerXToolsBinn;C:UsersmahmoodAppDataLocalProgramsPythonPython39Scripts;C:UsersmahmoodAppDataLocalProgramsPythonPython39;C:UsersmahmoodAppDataLocalMicrosoftWindowsApps;
            [SystemProfile] => C:Windowssystem32configsystemprofile
            [SystemProfileDesktop] => C:Windowssystem32configsystemprofileDesktop
            [PROCESSOR_LEVEL] => 6
            [PROCESSOR_REVISION] => 8c01
            [_] => C:
mppphpphp.exe
        )

    [_SESSION] => Array
        (
        )

    [name] => Tom
    [age] => 25
)