php if 문 한줄

<?

$a=3;

$a == "1" ? $msg="1" : $msg="2";

echo $msg;

?>

<?if($a==3) echo "ok": echo "no"?>

<?=$a==3?"ok":"no"?>

$section = isset($_GET['section']) ? $_GET['section'] : '';

$section2 = isset($_GET['section']) ? $_GET['section2'] : '';

$search = isset($_GET['search']) ? $_GET['search'] : '';

$page = isset($_GET['page']) ? $_GET['page'] : '';

$s_type = isset($_GET['s_type']) ? $_GET['s_type'] : '';

$s_type2 = isset($_GET['s_type2']) ? $_GET['s_type2'] : '';

$s_type3 = isset($_GET['s_type3']) ? $_GET['s_type3'] : '';

$sort = isset($_GET['sort']) ? $_GET['sort'] : '';

$s_year = isset($_GET['s_year']) ? $_GET['s_year'] : '';

GET POST 2개 다 받는 $_REQUEST

$uid = isset($_REQUEST['uid']) ? trim($_REQUEST['uid']) : null; 

array  

$uid = isset($_REQUEST['uid']) ? $_REQUEST['uid'] : null; 

php7 

$page = $_GET['page']??'';

$page = $_REQUEST['page']??'';

 ==================================================

if(isset($_REQUEST)) {

   foreach($_REQUEST as $key => $value)  {

  $value=  $Ins_News_util-> sql_inject($value);

  ${"$key"} = isset($value) ? $value : null;

   }

}

==================================================

////////////////////////////////////////////////////////////////////////

if(isset($_REQUEST)) {

   foreach($_REQUEST as $key => $value)  {

$value=  $Ins_News_util-> sql_inject($value);

${"$key"} = isset($value) ? $value : null;

}

}

/////////////////////////////////////////////////////////////////////////////

$var_set=array("d_mode","news_level_m","page","s_type","s_type2","s_type3","section2","news","search","section","sort");

foreach($var_set as $key=>$value) {

   ${"$value"} = isset($_REQUEST[$value]) ? trim($_REQUEST[$value]) : null; 

}