PHP 当前屏幕宽高

<?php

if (isset($_GET['width']) AND isset($_GET['height'])) {

    // output the geometry variables

    echo "Screen width is: " . $_GET['width'] . "<br />\n";

    echo "Screen height is: " . $_GET['height'] . "<br />\n";

} else {

    // pass the geometry variables

    // (preserve the original query string

    //   -- post variables will need to handled differently)

    echo "<script language='javascript'>\n";

    echo "  location.href=\"${_SERVER['SCRIPT_NAME']}?${_SERVER['QUERY_STRING']}"

        . "&width=\" + screen.width + \"&height=\" + screen.height;\n";

    echo "</script>\n";

    exit();

}

?>