PHP Conditional statements to identify iPad or iPod or iPhone

This tutorial will show you how to detect iPad or iPod or iPhone using PHP
Devices which request content from your website (usually) pass a user agent string. This contains information such as its name, OS, browser version, and rendering engine. Apple’s gadgets pass the following user agents, although you may find subtle variations in the version numbers

iPad user agent

Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10

iPhone user agent

HTTP_USER_AGENT=Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1C25 Safari/419.

iPhone user ageny

Mozilla/5.0 (iPod; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/3A101a Safari/419.3  

The following conditional statements can be used to identify iPad or iPod or iPhone

if (preg_match("/iP(od|hone|ad)/i", $_SERVER["HTTP_USER_AGENT"])) { ... }

or

if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') || strstr($_SERVER['HTTP_USER_AGENT'],'iPod') || strstr($_SERVER['HTTP_USER_AGENT'],'iPad')) { }