PHP学习之预定义变量(实例讲解)

php  /  管理员 发布于 7年前   409

超全局变量

超全局变量C超全局变量是全部作用域中始终可用的内置变量

$GLOBALS

一个包含了全部变量的全局组合数组。变量的名字就是数组的键。

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:\Work\python2.7\;D:\Work\python2.7\Scripts;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;D:\wampserver\mysql\bin;D:\Work\JAVA\tomcat\bin;D:\Work\Mozilla Firefox\firefox.exe;D:\Work\phantomjs\bin;D:\Work\chormedriver;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;D:\wampserver\php;C:\ProgramData\ComposerSetup\bi'... (length=607) 'SystemRoot' => string 'C:\WINDOWS' (length=10) 'COMSPEC' => string 'C:\WINDOWS\system32\cmd.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 '[email protected]' (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

以上这篇PHP学习之预定义变量(实例讲解)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。

您可能感兴趣的文章:

• PHP预定义变量9大超全局数组用法详解
• php预定义变量使用帮助（带实例）
• php中常用的预定义变量小结
• PHP教程 预定义变量
• 不常用但很实用的PHP预定义变量分析