[php] Check if PHP-page is accessed from an iOS device

I have a simple PHP webpage, and would like to return different content depending if it's accessed from an iPhone/iPad or from a web brower. How can I do that?

$browser = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");

In response to Haim Evgi's code, I added !== false to the end for it to work for me

$iPod    = stripos($_SERVER['HTTP_USER_AGENT'],"iPod") !== false;
$iPhone  = stripos($_SERVER['HTTP_USER_AGENT'],"iPhone") !== false;
$iPad    = stripos($_SERVER['HTTP_USER_AGENT'],"iPad") !== false;
$Android = stripos($_SERVER['HTTP_USER_AGENT'],"Android") !== false;

<?php
$iPhone = false;
$AndroidPhone = false;
$deviceType = 0;

$ua = strtolower($_SERVER['HTTP_USER_AGENT']);
print "<br>".$ua;

if(strpos($ua,"iphone") !== false ){
    $iPhone = true;
}
if(strpos($ua,"android") !== false){

    if(strpos($_SERVER['HTTP_USER_AGENT'],"mobile")){
        $AndroidPhone = true;        
    }
}
if(stripos($_SERVER['HTTP_USER_AGENT'],"iPad")){
    $iPad = true;
    $Tablet = true;
    $iOS = true;
}   

if($AndroidPhone==true || $iPhone==true)
{
    $deviceType = 1;
}
?>

function user_agent(){
    $iPod = strpos($_SERVER['HTTP_USER_AGENT'],"iPod");
    $iPhone = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
    $iPad = strpos($_SERVER['HTTP_USER_AGENT'],"iPad");
    $android = strpos($_SERVER['HTTP_USER_AGENT'],"Android");
    file_put_contents('./public/upload/install_log/agent',$_SERVER['HTTP_USER_AGENT']);
    if($iPad||$iPhone||$iPod){
        return 'ios';
    }else if($android){
        return 'android';
    }else{
        return 'pc';
    }
}

It's work for Iphone

<?php
  $browser = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
  if ($browser == true){
    $browser = 'iphone';
  }
?>

preg_match("/iPhone|Android|iPad|iPod|webOS/", $_SERVER['HTTP_USER_AGENT'], $matches);
$os = current($matches);

switch($os){
   case 'iPhone': /*do something...*/ break;
   case 'Android': /*do something...*/ break;
   case 'iPad': /*do something...*/ break;
   case 'iPod': /*do something...*/ break;
   case 'webOS': /*do something...*/ break;
}

function isIosDevice(){
    $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);
    $iosDevice = array('iphone', 'ipod', 'ipad');
    $isIos = false;

    foreach ($iosDevice as $val) {
        if(stripos($userAgent, $val) !== false){
            $isIos = true;
            break;
        }
    }

    return $isIos;
}

51Degrees' PHP solution is able to do this. you can get the free Open Source API here https://github.com/51Degrees/Device-Detection. You can use the HardwareFamily Property to determine if it is an iPad/iPod/iPhone etc.

Due to the nature of Apple's User-Agents the initial result will return a generic device, however if you are interested in the specific device you can use a JavaScript client side override to determine to specific model.

To do this you can implement something similar to the following logic once you have determined it is an Apple Device, in this case for an iPhone.

// iPhone model checks.
function getiPhoneModel() {
// iPhone 6 Plus
if ((window.screen.height / window.screen.width == 736 / 414) && 
(window.devicePixelRatio == 3)) {
return "iPhone 6 Plus";
}
// iPhone 6
else if ((window.screen.height / window.screen.width == 667 / 375) && 
(window.devicePixelRatio == 2)) {
return "iPhone 6";
}
// iPhone 5/5C/5S or 6 in zoom mode
else if ((window.screen.height / window.screen.width == 1.775) && 
(window.devicePixelRatio == 2)) {
return "iPhone 5, 5C, 5S or 6 (display zoom)";
}
// iPhone 4/4S
else if ((window.screen.height / window.screen.width == 1.5) && 
(window.devicePixelRatio == 2)) {
return "iPhone 4 or 4S";
}
// iPhone 1/3G/3GS
else if ((window.screen.height / window.screen.width == 1.5) && 
(window.devicePixelRatio == 1)) {
return "iPhone 1, 3G or 3GS";
} else {
return "Not an iPhone";
};
}

Or for an iPad

function getiPadVersion() {
var pixelRatio = getPixelRatio();
var return_string = "Not an iPad";
if (pixelRatio == 1 ) {
return_string = "iPad 1, iPad 2, iPad Mini 1";
}
if (pixelRatio == 2) {
return_string = "iPad 3, iPad 4, iPad Air 1, iPad Air 2, iPad Mini 2, iPad 
Mini 3";
}
return return_string;
}

For more information on research 51Degrees have done into Apple devices you can read their blog post here https://51degrees.com/blog/device-detection-for-apple-iphone-and-ipad.

Disclosure: I work for 51Degrees.

If you just want to detect mobile devices in generel, Cake has build in support using RequestHandler->isMobile() (http://book.cakephp.org/2.0/en/core-libraries/components/request-handling.html#RequestHandlerComponent::isMobile)