PHP判断手机是IOS还是Android的三个方法

function get_device_type()
{
 //全部变成小写字母
 $agent = strtolower($_SERVER['HTTP_USER_AGENT']);
 $type = 'other';
 //分别进行判断
 if(strpos($agent, 'iphone') || strpos($agent, 'ipad'))
{
 $type = 'ios';
 } 
 
 if(strpos($agent, 'android'))
{
 $type = 'android';
 }
 return $type;
}

<?php
if(strpos($_SERVER[&#39;HTTP_USER_AGENT&#39;], &#39;iPhone&#39;)||strpos($_SERVER[&#39;HTTP_USER_AGENT&#39;], &#39;iPad&#39;)){
 echo &#39;systerm is IOS&#39;;
}else if(strpos($_SERVER[&#39;HTTP_USER_AGENT&#39;], &#39;Android&#39;)){
 echo &#39;systerm is Android&#39;;
}else{
 echo &#39;systerm is other&#39;;
}
?>

function get_device_type()
{
 //全部变成小写字母
 $agent = strtolower($_SERVER['HTTP_USER_AGENT']);
 $type ='other';
 //分别进行判断
 if(strpos($agent,'iphone') || strpos($agent,'ipad'))
{
 $type ='ios';
 }
 
 if(strpos($agent,'android'))
{
 $type ='android';
 }
 return$type;
}