Question

代码如下。有一个文件预览按钮，它在chrome和firefox中很好地显示，但在IE中它没有显示。

$ua = htmlentities($_SERVER['HTTP_USER_AGENT'], ENT_QUOTES, 'UTF-8');
if (preg_match('~MSIE|Internet Explorer~i', $ua) || (strpos($ua, Trident/7.0; rv:11.0') !== false)) {
// do stuff for IE
}
else{

if(strtolower($aRow["extension"])=='pdf')
{ 
$editable .="<a class=\"iframe\" href=\"javascript:viewPdf('http://{$_SERVER['SERVER_NAME']}{$script_dir}{
$aRow["path"]}');\" title=\"Preview\"><span class=\"glyphicon glyphicon-zoom-in\"></span></a>&nbsp;";
}

Answer 1

您的初始if条件阻止Internet Explorer呈现按钮。为了在任何浏览器上显示它，您应该移动原始if-else块之外的第二个if条件，例如：

$ua = htmlentities($_SERVER['HTTP_USER_AGENT'], ENT_QUOTES, 'UTF-8');
if (preg_match('~MSIE|Internet Explorer~i', $ua) || (strpos($ua, 'Trident/7.0; rv:11.0') !== false)) {
    // do stuff for IE
}
else {
    // do stuff for other browsers that are not IE
}

if(strtolower($aRow["extension"])=='pdf') { 
    // render the button regardless browser User Agent (UA)
    $editable .="<a class=\"iframe\" href=\"javascript:viewPdf('http://{$_SERVER['SERVER_NAME']}{$script_dir}{
    $aRow["path"]}');\" title=\"Preview\"><span class=\"glyphicon glyphicon-zoom-in\"></span></a>&nbsp;";
}

Internet Explorer浏览器

1 个答案: