Whats the use of BrowserMatch or Options All in .htaccess?

BrowserMatch 指令 ; 設定根據HTTP User-Agent 的條件式環境變數 · BrowserMatch 正規表示式[!]env-variable[=值] [[!]env-variable[=值]] ... · 伺服器設定、虛擬主機、目錄 ...

The BrowserMatch directive allows the server to define environment variables and take appropriate actions based on the User-Agent HTTP header field.

BrowserMatch Directive. Description: Sets environment variables conditional on HTTP User-Agent. Syntax: BrowserMatch regex [!]env-variable[= ... BrowserMatch · BrowserMatchNoCase · SetEnvIf

To make these mechanisms as flexible as possible, they are invoked by defining environment variables, typically with BrowserMatch , though SetEnv and PassEnv ...

The mod_setenvif module allows you to set internal environment variables according to whether different aspects of the request match regular expressions you ...

BrowserMatch is used to change behavior based on the user-agent string. It sets environmental variables that Apache uses. In this case it's ...

According to this table os Safari user agents, it seems that you could target by device like this: BrowserMatch iPhone nokeepalive #All ...

This effects all IE browsers, including IE10. Prior to IE6, ancient and unpatched versions of IE sometimes encountered connection failures when ...

讓一台伺服器綁定多個網址是利用伺服器資源的好方法，也是架站必學技巧～ 其實只需要去除https的設定值即可套用在http上面！

Note that there is no difference between BrowserMatch and SetEnvIf User-Agent . BrowserMatch exists for backward compatibility.