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Editorial Team
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Asked: 2026-06-10T05:27:05+00:00

I’m trying to set up a conditional system which programatically detects both the browser

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I’m trying to set up a conditional system which programatically detects both the browser (using the USER_AGENT string) and the platform (using PHP-Mobile-Detect). My current setup looks roughly like this:

<DOCTYPE html>
<html>
<head>
<?php
include("Mobile_Detect.php");
$detect = new Mobile_Detect();
?>
    <?php if($detect->isiPad()) {
        echo '<link rel="stylesheet" href="/style/iPad.css" type="text/css">';
    }

    else 
    {
        echo '<meta charset="UTF-8">
        <link rel="stylesheet" href="/style.css" type="text/css">;
        if (strpos($_SERVER['HTTP_USER_AGENT'], 'Chrome') !== false)
            {
                echo '<link rel="stylesheet" href="../style/splash-webkit.css" type="text/css">';
            }
        //and so on for other browsers
        [etc]'
    }

The obvious problem that occurs here, is the conflict between the 's. The echo under else, rather than ending at the end of my <style> tag, as I would want it to, ends at the first ' to appear in the code, which, as it were, is in the first USER_AGENT declaration.
How can I bypass this issue?

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1 Answer

  1. Editorial Team

    You missed a ' at the end of this line:

    <link rel="stylesheet" href="/style.css" type="text/css">;

    Replace it with:

    <link rel="stylesheet" href="/style.css" type="text/css">';

    You are using single and double quotes nicely though. However, if you do need to use the same quotes, you can always escape them with a \. For example, this would also work:

    echo '<meta charset=\'UTF-8\'>';
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