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Asked: 2026-05-29T15:35:03+00:00

I tried using <?php echo php_uname(m); ?> , it returns i586 but I am

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I tried using <?php echo php_uname("m"); ?>, it returns i586 but I am on Windows 7 64 bit which I could see in My Computers Properties. So I am expecting x86_64 in output. Does any one know how to determine OS Architecture in PHP ?

I want the same thing for Mac OS X too. Any help would be appreciated.

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1 Answer

  1. Editorial Team

    My best guess is that even though your OS is 64bit, your Webserver is x86 and runs in WOW64-mode (32bit). If that’s the case, it should be hard to figure out in pure PHP.

    My suggestion (thanks to Leigh for linking to a similar question) is to use WMI:

    $out = array();
exec("wmic cpu get DataWidth", $out);
$bits = strstr(implode("", $out), "64") ? 64 : 32;
echo $bits; // 32 or 64
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