Php judges that the client is a mobile phone device and jumps to the mobile phone station

The following are the functions I am using, but it seems that there is something wrong with the iphone. If you have a better solution, you can leave a message and send it to me. Thank you very much.

The code is as follows:

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// If it is set on the mobile phone, jump to the mobile phone Page If (isMobile ()){ Header ("Location: mobile. php "); Exit (); } /** * Determine whether a user is a Mobile user and whether the user is a Mobile user. You can determine the iphone, Android, Windows Mobile, and general Mobile phone systems. */ Function isMobile (){ // Determine the iphone and ipad. Do not jump $ UserAgent = $ _ SERVER ['http _ USER_AGENT ']; If (strpos ($ userAgent, "iPhone") | Strpos ($ userAgent, "iPad") | Strpos ($ userAgent, "iPod") | Strpos ($ userAgent, "iOS ")){ Return false;     } // If HTTP_X_WAP_PROFILE exists, it must be a mobile device. If (isset ($ _ SERVER ['http _ X_WAP_PROFILE ']) { Return true;     } // If the via information contains wap, it must be a mobile device. Some service providers will block this information. If (isset ($ _ SERVER ['http _ VIA ']) { // Flase cannot be found; otherwise, true Return stristr ($ _ SERVER ['http _ vean'], "wap ")? True: false;     } // Determine the client flag sent by the mobile phone. The compatibility needs to be improved. If (isset ($ _ SERVER ['http _ USER_AGENT ']) { $ Clientkeywords = array ( 'Nokia ', 'Sony ', 'Ericsson ', 'MOT ', 'Samsung ', 'HTC ', 'Sgh ', 'LG ', 'Sharp ', 'Sie -', 'Philips ', 'Panasonic ', 'Alcatel ', 'Lenovo ', 'IPhone ', 'IPod ', 'BlackBerry ', 'Meizu ', 'Android ', 'Netfront ', 'Symbian ', 'Ucweb ', 'Windowsce ', 'Palm ', 'Operamini ', 'Operamobi ', 'Openwave ', 'Nexusone ', 'Cldc ', 'Midp ', 'Wap ', 'Mobile' ); // Search for the keyword of the mobile browser from HTTP_USER_AGENT If (preg_match ("/(". implode ('|', $ clientkeywords ). ")/I", strtolower ($ _ SERVER ['http _ USER_AGENT ']) { Return true;         }     } // Resolution, which may be inaccurate and placed in the final judgment If (isset ($ _ SERVER ['http _ ACCEPT ']) { // If only wml is supported and html is not supported, it must be a mobile device. // If wml and html are supported, but wml is a mobile device before html If (strpos ($ _ SERVER ['http _ ACCEPT '], 'vnd. wap. Wml ')! = False )&& (Strpos ($ _ SERVER ['http _ ACCEPT '], 'text/html') ===false | (strpos ($ _ SERVER ['http _ ACCEPT '], 'vnd. wap. wml') <strpos ($ _ SERVER ['http _ ACCEPT '], 'text/html ')))){ Return true;         }     } Return false; }