PHP学习之预定义变量(实例讲解)
发布时间：2020-12-12 22:23:54 所属栏目：PHP教程 来源：网络整理
导读：超全局变量 超全局变量–超全局变量是全部作用域中始终可用的内置变量 $GLOBALS 以上例程的输出类似于：$foo in global scope: Example content$foo in current scope: local variable $_SERVER ";var_dump($_SERVER);output:array (size=35) 'HTTP_HOST' =>
超全局变量超全局变量–超全局变量是全部作用域中始终可用的内置变量 $GLOBALS
以上例程的输出类似于：
$foo in global scope: Example content
$foo in current scope: local variable
$_SERVER ";
var_dump($_SERVER);
output:
array (size=35)
'HTTP_HOST' => string 'localhost' (length=9)
'HTTP_CONNECTION' => string 'keep-alive' (length=10)
'HTTP_UPGRADE_INSECURE_REQUESTS' => string '1' (length=1)
'HTTP_USER_AGENT' => string 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/53.0.2785.104 Safari/537.36 Core/1.53.3538.400 QQBrowser/9.6.12501.400' (length=153)
'HTTP_ACCEPT' => string 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' (length=74)
'HTTP_REFERER' => string 'http://localhost/test/' (length=22)
'HTTP_ACCEPT_ENCODING' => string 'gzip,deflate,sdch' (length=19)
'HTTP_ACCEPT_LANGUAGE' => string 'zh-CN,zh;q=0.8' (length=14)
'PATH' => string '%APPCAN_PATH%;D:Workpython2.7;D:Workpython2.7Scripts;C:ProgramDataOracleJavajavapath;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;D:wampservermysqlbin;D:WorkJAVAtomcatbin;D:WorkMozilla Firefoxfirefox.exe;D:Workphantomjsbin;D:Workchormedriver;C:WINDOWSsystem32configsystemprofile.dnxbin;C:Program FilesMicrosoft DNXDnvm;C:Program FilesMicrosoft SQL Server130ToolsBinn;D:wampserverphp;C:ProgramDataComposerSetupbi'... (length=607)
'SystemRoot' => string 'C:WINDOWS' (length=10)
'COMSPEC' => string 'C:WINDOWSsystem32cmd.exe' (length=27)
'PATHEXT' => string '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC' (length=53)
'WINDIR' => string 'C:WINDOWS' (length=10)
'SERVER_SIGNATURE' => string '' (length=0)
'SERVER_SOFTWARE' => string 'Apache/2.4.18 (Win64) OpenSSL/1.0.2g PHP/5.6.19' (length=47)
'SERVER_NAME' => string 'localhost' (length=9)
'SERVER_ADDR' => string '::1' (length=3)
'SERVER_PORT' => string '80' (length=2)
'REMOTE_ADDR' => string '::1' (length=3)
'DOCUMENT_ROOT' => string 'D:/wampserver/www' (length=17)
'REQUEST_SCHEME' => string 'http' (length=4)
'CONTEXT_PREFIX' => string '' (length=0)
'CONTEXT_DOCUMENT_ROOT' => string 'D:/wampserver/www' (length=17)
'SERVER_ADMIN' => string 'admin@example.com' (length=17)
'SCRIPT_FILENAME' => string 'D:/wampserver/www/test/$_SERVER.php' (length=35)
'REMOTE_PORT' => string '57305' (length=5)
'GATEWAY_INTERFACE' => string 'CGI/1.1' (length=7)
'SERVER_PROTOCOL' => string 'HTTP/1.1' (length=8)
'REQUEST_METHOD' => string 'GET' (length=3)
'QUERY_STRING' => string '' (length=0)
'REQUEST_URI' => string '/test/$_SERVER.php' (length=18)
'SCRIPT_NAME' => string '/test/$_SERVER.php' (length=18)
'PHP_SELF' => string '/test/$_SERVER.php' (length=18)
'REQUEST_TIME_FLOAT' => float 1510122616.201
'REQUEST_TIME' => int 1510122616
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