我怎样才能得到任何项目的价值作为回应

这是laravel给出的响应，我想从中得到email的值。我该怎么做。。

我刚刚做了

print_r($request); 

获取类似的以下数组

Illuminate'Http'Request Object ( [json:protected] => Symfony'Component'HttpFoundation'ParameterBag Object ( [parameters:protected] => Array ( [email] => sa@sysaxiom.com [password] => allau [request] => 1221 ) ) [sessionStore:protected] => [userResolver:protected] => [routeResolver:protected] => [attributes] => Symfony'Component'HttpFoundation'ParameterBag Object ( [parameters:protected] => Array ( ) ) [request] => Symfony'Component'HttpFoundation'ParameterBag Object ( [parameters:protected] => Array ( [email] => sa@sysaxiom.com [password] => allau [request] => 1221 ) ) [query] => Symfony'Component'HttpFoundation'ParameterBag Object ( [parameters:protected] => Array ( ) ) [server] => Symfony'Component'HttpFoundation'ServerBag Object ( [parameters:protected] => Array ( [REDIRECT_MIBDIRS] => C:/xampp/php/extras/mibs [REDIRECT_MYSQL_HOME] => 'xampp'mysql'bin [REDIRECT_OPENSSL_CONF] => C:/xampp/apache/bin/openssl.cnf [REDIRECT_PHP_PEAR_SYSCONF_DIR] => 'xampp'php [REDIRECT_PHPRC] => 'xampp'php [REDIRECT_TMP] => 'xampp'tmp [REDIRECT_STATUS] => 200 [MIBDIRS] => C:/xampp/php/extras/mibs [MYSQL_HOME] => 'xampp'mysql'bin [OPENSSL_CONF] => C:/xampp/apache/bin/openssl.cnf [PHP_PEAR_SYSCONF_DIR] => 'xampp'php [PHPRC] => 'xampp'php [TMP] => 'xampp'tmp [HTTP_HOST] => 192.168.1.58 [HTTP_CONNECTION] => keep-alive [CONTENT_LENGTH] => 61 [HTTP_ACCEPT] => application/json, text/plain, */* [HTTP_ORIGIN] => http://192.168.1.58 [HTTP_USER_AGENT] => Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36 [CONTENT_TYPE] => application/json;charset=UTF-8 [HTTP_REFERER] => http://192.168.1.58/sa/app/ [HTTP_ACCEPT_ENCODING] => gzip, deflate [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.8 [PATH] => C:'Windows'system32;C:'Windows;C:'Windows'System32'Wbem;C:'Windows'System32'WindowsPowerShell'v1.0';C:'Program Files (x86)'QuickTime'QTSystem';C:'Program Files (x86)'VisualSVN Server'bin;C:'xampp'htdocs'ibrahim'bootstrap'bootstrap-3.2.0';C:'Program Files (x86)'MySQL'MySQL Utilities 1.4';C:'Program Files (x86)'MySQL'MySQL Utilities 1.4'Doctrine extensions for PHP';C:'Program Files'TortoiseSVN'bin;D:'Developement'Websites'algrapha;C:'adb;C:'Program Files (x86)'Calibre2';C:'Program Files'nodejs';;E:'Sulthan'sw'androidsdk'tools;E:'Sulthan'sw'androidsdk'platform-tools; [SystemRoot] => C:'Windows [COMSPEC] => C:'Windows'system32'cmd.exe [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY [WINDIR] => C:'Windows [SERVER_SIGNATURE] =>
Apache/2.4.9 (Win32) OpenSSL/1.0.1g PHP/5.5.11 Server at 192.168.1.58 Port 80
[SERVER_SOFTWARE] => Apache/2.4.9 (Win32) OpenSSL/1.0.1g PHP/5.5.11 [SERVER_NAME] => 192.168.1.58 [SERVER_ADDR] => 192.168.1.58 [SERVER_PORT] => 80 [REMOTE_ADDR] => 192.168.1.58 [DOCUMENT_ROOT] => D:/Development/Websites [REQUEST_SCHEME] => http [CONTEXT_PREFIX] => [CONTEXT_DOCUMENT_ROOT] => D:/Development/Websites [SERVER_ADMIN] => postmaster@localhost [SCRIPT_FILENAME] => D:/Development/Websites/sa/sys/index.php [REMOTE_PORT] => 51808 [REDIRECT_URL] => /sa/sys/appLogin [GATEWAY_INTERFACE] => CGI/1.1 [SERVER_PROTOCOL] => HTTP/1.1 [REQUEST_METHOD] => POST [QUERY_STRING] => [REQUEST_URI] => /sa/sys/appLogin [SCRIPT_NAME] => /sa/sys/index.php [PHP_SELF] => /sa/sys/index.php [REQUEST_TIME_FLOAT] => 1446717323.371 [REQUEST_TIME] => 1446717323 ) ) [files] => Symfony'Component'HttpFoundation'FileBag Object ( [parameters:protected] => Array ( ) ) [cookies] => Symfony'Component'HttpFoundation'ParameterBag Object ( [parameters:protected] => Array ( ) ) [headers] => Symfony'Component'HttpFoundation'HeaderBag Object ( [headers:protected] => Array ( [host] => Array ( [0] => 192.168.1.58 ) [connection] => Array ( [0] => keep-alive ) [content-length] => Array ( [0] => 61 ) [accept] => Array ( [0] => application/json, text/plain, */* ) [origin] => Array ( [0] => http://192.168.1.58 ) [user-agent] => Array ( [0] => Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36 ) [content-type] => Array ( [0] => application/json;charset=UTF-8 ) [referer] => Array ( [0] => http://192.168.1.58/sa/app/ ) [accept-encoding] => Array ( [0] => gzip, deflate ) [accept-language] => Array ( [0] => en-US,en;q=0.8 ) ) [cacheControl:protected] => Array ( ) ) [content:protected] => {"email":"sa@sysaxiom.com","password":"allau","request":1221} [languages:protected] => [charsets:protected] => [encodings:protected] => [acceptableContentTypes:protected] => [pathInfo:protected] => [requestUri:protected] => [baseUrl:protected] => [basePath:protected] => [method:protected] => [format:protected] => [session:protected] => Illuminate'Session'Store Object ( [id:protected] => e49a6db4e413cb6c89c3aa54f6b4bfc8835239b5 [name:protected] => laravel_session [attributes:protected] => Array ( [_token] => vZkuq36fFbiwMTpu3uchkTKiXg1auFdrvTcEK57V ) [bags:protected] => Array ( ) [metaBag:protected] => Symfony'Component'HttpFoundation'Session'Storage'MetadataBag Object ( [name:Symfony'Component'HttpFoundation'Session'Storage'MetadataBag:private] => __metadata [storageKey:Symfony'Component'HttpFoundation'Session'Storage'MetadataBag:private] => _sf2_meta [meta:protected] => Array ( [u] => 1446717323 [c] => 1446717323 [l] => 0 ) [lastUsed:Symfony'Component'HttpFoundation'Session'Storage'MetadataBag:private] => 1446717323 [updateThreshold:Symfony'Component'HttpFoundation'Session'Storage'MetadataBag:private] => 0 ) [bagData:protected] => Array ( [_sf2_meta] => Array ( [u] => 1446717323 [c] => 1446717323 [l] => 0 ) ) [handler:protected] => Illuminate'Session'FileSessionHandler Object ( [files:protected] => Illuminate'Filesystem'Filesystem Object ( ) [path:protected] => D:'Development'Websites'sa'sys'storage/framework/sessions ) [started:protected] => 1 ) [locale:protected] => [defaultLocale:protected] => en )

这来自文件VerifyCsrfToken.php

public function handle($request, Closure $next)
    {
        print_r($request);
        exit;
        return parent::handle($request, $next);
    }

我怎样才能拿到它？