添加http头以强制IE8以IE7模式呈现（PHP版本）

Posted 2021-02-26

include this snippet in your sites to force InternetExplorer 8 to display your site like InternetExplorer 7

In summary, IE7 compatibility support looks as follows:

IE=7

Display in IE7 Standards mode; Already supported in the IE8 Beta 1 release

IE=EmulateIE7

Display standards DOCTYPEs in IE7 Standards mode; Display quirks DOCTYPEs in Quirks mode; Available through the IE June Security Update for IE8 Beta 1

if (strpos($_SERVER['HTTP_USER_AGENT'],"MSIE 8")) {header("X-UA-Compatible: IE=7");}
 
 
if (strpos($_SERVER['HTTP_USER_AGENT'],"MSIE 8")) {header("X-UA-Compatible: IE=EmulateIE7");}