我的移动PHP重定向不起作用

Question

帮助!我尝试了一些不同的代码，但都无法重定向到移动端。我在一个godaddy服务器上，这是我的代码，用index.php编写

<?php
$iphone = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
$android = strpos($_SERVER['HTTP_USER_AGENT'],"Android");
$palmpre = strpos($_SERVER['HTTP_USER_AGENT'],"webOS");
$berry = strpos($_SERVER['HTTP_USER_AGENT'],"BlackBerry");
$ipod = strpos($_SERVER['HTTP_USER_AGENT'],"iPod");

if ($iphone || $android || $palmpre || $ipod || $berry == true) 
{ 
header('Location: http://mobile.practicallunacy.com/');
}
?>

-编辑-这是我将其更改为的内容。别对我太客气，我对php了解不多。

<?php
    $iphone = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
    $android = strpos($_SERVER['HTTP_USER_AGENT'],"Android");
    $palmpre = strpos($_SERVER['HTTP_USER_AGENT'],"webOS");
    $berry = strpos($_SERVER['HTTP_USER_AGENT'],"BlackBerry");
    $ipod = strpos($_SERVER['HTTP_USER_AGENT'],"iPod");

if ($iphone = true) if ($android = true) if ($palmpre = true) if ($ipod =     true) if ($berry = true) 
{ 
header('Location: http://mobile.practicallunacy.com/');
}
?>

-编辑

基于别人告诉我做的事情，这是我放进去的新代码……它仍然不起作用。

<?php
$iphone = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
$android = strpos($_SERVER['HTTP_USER_AGENT'],"Android");
$palmpre = strpos($_SERVER['HTTP_USER_AGENT'],"webOS");
$berry = strpos($_SERVER['HTTP_USER_AGENT'],"BlackBerry");
$ipod = strpos($_SERVER['HTTP_USER_AGENT'],"iPod");

if ($iphone == true) 
{ 
header('Location: http://mobile.practicallunacy.com/');
}
if ($android == true)
{ 
header('Location: http://mobile.practicallunacy.com/');
}
if ($palmpre == true)
{ 
header('Location: http://mobile.practicallunacy.com/');
}
if ($ipod == true)
{ 
header('Location: http://mobile.practicallunacy.com/');
}
if ($berry == true) 
{ 
header('Location: http://mobile.practicallunacy.com/');
}
?>

Answer 1

if(($iphone || $android || $palmpre || $ipod || $berry) === true){ 
header('Location: http://mobile.practicallunacy.com/');
}

if语句中需要使用双括号，请注意the operators之间的差异

Answer 2

你的语法全错了，这段代码不会运行。您的最后一次尝试在语法上是正确的，但是没有考虑到strpos()的反复无常，它可以在匹配的情况下返回0。

<?php
$iphone  = strpos($_SERVER['HTTP_USER_AGENT'], "iPhone");
$android = strpos($_SERVER['HTTP_USER_AGENT'], "Android");
$palmpre = strpos($_SERVER['HTTP_USER_AGENT'], "webOS");
$berry   = strpos($_SERVER['HTTP_USER_AGENT'], "BlackBerry");
$ipod    = strpos($_SERVER['HTTP_USER_AGENT'], "iPod");

if ($iphone !== false || $android !== false || $palmpre !== false || $ipod !== false || $berry !== false) {
    header("Location: http://mobile.practicallunacy.com/");
}

注意严格的相等性检查的用法；0 == true但0 !== true。

不过，这是正则表达式搜索的一个很好的用法：

<?php
if (preg_match("/iphone|android|webos|blackberry|ipod/i", $_SERVER['HTTP_USER_AGENT'])) {
    header("Location: http://mobile.practicallunacy.com/");
}