php数组操作实例三

*/
$array1=array("a"=>"green","red","blue");
$array2=array("b"=>"green","yellow","red");
$result=array_intersect($array1,$array2);//计算交集并赋值
print_r($result);

//

$search_array=array('first'=>1,'second'=>4);   //定义数组
if(array_key_exists('first',$search_array))    //判断键是否存在于数组中
{
  echo "the 'first' element is in the array";    //输出相应信息
}

//

$ar1=array("color"=>array("favorite"=>"red"),5);
$ar2=array(10,"color"=>array("favorite"=>"green","blue"));
$result=array_merge_recursive($ar1,$ar2);   //合并两个数组返回一个结果数组
print_r($result);         //输出结果

//

$array1=array("color"=>"red",2,4);
$array2=array("a","b","color"=>"green","shape"=>"trapezoid",4);
$result=array_merge($array1,$array2);     //合并两个数组
print_r($result);          //输出结果内容

//

$ar1=array("10",100,100,"a");    //定义数组1
$ar2=array(1,3,"2",1);     //定义数组2
array_multisort($ar1,$ar2);    //排序2个数组
var_dump($ar1);      //打印排序后的结果
var_dump($ar2);      //打印排序后的结果

//
$stack=array("orange","banana","apple","rasp教程berry");  //定义一个数组
$fruit=array_pop($stack);        //最后一个元素出栈
print_r($stack);          //显示结果

//

$stack=array("orange", "banana");     //定义原始数组
array_push($stack,"apple","raspberry");    //执行压栈操作
print_r($stack);         //显示结果，将返回四个值

//

srand((float)microtime()*10000000);       //为随机数发生器播种
$input=array("neo","morpheus","trinity","cypher","tank");   //定义原始数组
$rand_keys=array_rand($input,2);       //随机挑选数组元素
print $input[$rand_keys[0]]."n";        //分别显示随机挑选的数组元素
print $input[$rand_keys[1]]."n";