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PHP Code to Detect IE Browsers

May 24, 2009

The extremely buggy way that Internet Explorer renders CSS annoyed me again, this time because of the different way it displays elements with z-indexes.

I spent a couple of hours trying to fix the bug, failed, and decided to go about it another way. The problem lay in a CSS/Javascript rotating banner gallery ,so I used PHP to redirect all Internet Explorer users to a static version of that instead.

Here’s the PHP code that I used. This is the function, put it anywhere in your PHP file:

function detectIE()
{
if (isset($_SERVER['HTTP_USER_AGENT']) && (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false))
return true;
else
return false;
}

And this is how I called it:


if detectIE() {
//if true, means the user's on IE
//do all the IE stuff here...
} else {
//all is fine
//use normal code here
}

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