PHP automatically identifies the mobile terminal currently in use

class self_test { 
  
 const PC = 'pc'; 
  
 const SP = 'sp'; 
  
 private $_splist = array('iPhone','Android','iPod','iPad','Tizen');//设置经常使用的sp终端,暂时常用的sp端就这几种,如果有的话大家也可以增加 
 
 private $terminal; 
  
 public function __construct(){ 
  $this->setTerminal();//通过setTerminal()方法获取到$terminal变量的值 
 } 
  
 /* 
  * function setTerminal() 
  * 获取终端信息 
  * @return string 
  */ 
  
 private function setTerminal(){ 
  $isSp = false; 
  foreach($this->_splist as $spname){ 
   if (strstr($_SERVER['HTTP_USER_AGENT'], $spname)) { 
    $isSp = true; 
    break; 
   } 
  } 
  return $this->terminal = ($isSp) ? self::SP : self::PC; 
 } 
  
 /* 
  * function PC_SP() 
  * 输出终端信息 
  * @return string 
  */ 
 public function PC_SP(){ 
  return $this->terminal; 
 } 
} 
 
$str = new self_test(); 
echo $str->PC_SP();//输出目前客户使用的是PC还是SP

class self_test {  
 const PC = 'pc';  
 const SP = 'sp';  
 private $_splist = array('iPhone','Android','iPod','iPad','Tizen');//设置经常使用的sp终端,暂时常用的sp端就这几种,如果有的话大家也可以增加 
 private $environment;  
 public function __construct(){ 
  $this->setEnvironment();//通过setEnvironment()方法获取到$terminal变量的值 
 } 
  
 /* 
  * function environment() 
  * 输出终端信息 
  * @return string 
  */ 
 public function environment(){ 
  return $this->environment; 
 } 
  
 /* 
  * function setEnvironment() 
  * 获取终端信息 
  * @return string 
  */ 
 private function setEnvironment(){ 
  $isSp = self::PC;//如果是PC端，就不需要判断是安卓还是apple了，所以只输出pc就可以 
  foreach($this->_splist as $spname){ 
   if (strstr($_SERVER['HTTP_USER_AGENT'], $spname)) { 
    $isSp = $spname; 
    break; 
   } 
  } 
  return $this->environment = $isSp; 
 } 
} 
$str = new self_test(); 
echo $str->environment();//输出目前客户使用的终端