PHP字符串与数组

//POST
if(isset( $_POST[‘add_gift‘] )) {
 　　$game=trim( $_POST[‘game‘] );  
}


//GET 
if(isset( $_GET[‘add_gift‘] )) {
 　　$game=trim( $_GET[‘game‘] );  
}

foreach( $items as  $item ){
     echo $item;  //一个元素
}

foreach( $arr as $key => $value ){
    echo $key;      //键
    echo $value;  //值
}

$arr = explode(‘|‘,"abc|123");
list($str1, $str2) = $arr;
echo $str1; 
echo $str2;

$records=[];   //数组的初始化

$arr1=[ ‘jxjz‘,‘dt2‘,‘fmz‘]   //一维数组创建

$arr2 =[                       //二维数组创建
　　[‘jxjz‘,‘剑啸九州‘],
　　[‘dt2‘,‘大唐2‘],
　　[‘fmz‘,‘伏魔者‘]
];


array_push($arr1,"ddd");                  //动态插入一维数组
array_push($arr2, [ "aaa","bbb"  ]);   //动态插入二维数组

Session_Start();
if( !isset( $_SESSION[‘groups‘] ) ){
　　$session = $_SESSION[‘groups‘] ;
}